This essay is actually really well written :) I only made one or two small changes. 

Essay #79 "Modern Families" 06.04.18

Nowadays, families do not show the same level of intimacy and togetherness as in the olden days. Basically, changes in the world itself have led to this situation. Despite the fact that this seems to be an issue which only affects families from within, it actually affects society as a whole.

Firstly, we need to clear up the reasons behind this. As our lifestyles in the world become faster, people have less time for their relatives, and a simple family dinner becomes a rarity. The members of a family often have different, and busy, work or school schedules so it is hard for them to get together. This leads to another issue that makes the initial one even worse. The lack of interaction between family members creates a significant gap in shared interests, so even in the rare case of a family gathering people have very little to talk about.

All these have an influence on society. For example, as parents spend less time with their children, they have less of an effect on their development, so there is more chance for them to be affected by examples of negative behaviour they might see on the streets. Moreover, because of the gap in shared interests, society becomes more layered and it becomes extremely difficult to share ideas between generations. Each generation starts to live in their own world, without any notion about others and about their ideals, beliefs and views.

To conclude: with the increasing pace of life, modern families have become more detached and the consequences of this have had a negative effect on our society. Now parents are less involved in the development of their kids and it has become harder to share ideas between generations. All we can do is to try and find some time that we could devote to simple conversations with our relatives. Even such tiny efforts could change the atmosphere in a family.

Interesting topic, I've just corrected to make it sound more natural. Some explanations below :) 

HOOK-UP CULTURE IN THE UNITED STATES

The sexual revolution *had shed a new light* (replace with: brought big changes) to society in the 1960s. Attitudes changed, and people accepted new ideas about sexuality. They became more open and -(don't need to say 'more' twice)- practical toward sexual practices. I think hook-up culture has been happening for a long time, and is inherited from that movement. Today, people don’t discuss it in public; but society still has a hook-up culture, but with new approaches involving technology and social media.

*shed new light: this idiom doesn't quite work in this context. 'Shed light on' implies that we already know something, but we need to see something else to confirm it. I've given some examples, but in the case of the sexual revolution, it's new to society so doesn't give us more information about something we already know. 

e.g.

1. 'Finding the gun at the crime scene shed new light on Mr.Grayson's location at the time of the murder.'

2. 'The collection of antique tables in his home shed new light on why Steve was spending so much time at the antique store.'

Interesting article-- I'll tidy it for you :) 

Salmons

The salmon population is decreasing rapidly. They have several problems going to places where they spawn and then returning to the sea. The salmon cycle is complex and sensitive to change. As the salmons experimenting changes in their bodies*, as an adaptation to live in salt waters, they need to reach the ocean quickly.
Nowadays, river currents have suffered lot of changes because of the impact of human societies on the environment. One of the main difficulties salmon have to overcome are dams, big walls constructed by humans, which fragment the river flow. The other difficulty is descending river flow caused by the retention of water in the dams, when melted ice from the mountains flows down.
Scientists have proposed some solutions, but not everybody seems to like them. One of them is to take the fish from the sea and then carry them up to mountain currents. But this method has been proven to have a high rate of mortality during the process. Other proposed solution are to open the doors of dams and raise the water flow of rivers during the time of salmon migration. But, of course, electrical companies reject this solution.

*In this part the meaning is unclear. Do the salmon change their own bodies? Or are scientists experimenting with salmons bodies. I can correct once I know :) 

I hope everything is okay with your situation-- I'll tidy this for you. 

Final letter

Dear C.:

We are very surprised to see that the room is already ocuppied by another tenant. It confirms our hunch about your behaviour: applying a penalty charge to us without a real reason to do it, because the lack of keys during these days wasn't a real problem for you. In other words: you are trying to take advantage of the situation, charging the room to two tenants simultaneously.

We won't go to Monica's house to return the room's keys. Keeping in mind you said you will withdraw the extra days from the deposit, it's not worth meeting with her. 50 euros is less than the 2% of the total amount we paid you during the whole rental time. We can afford it. Enjoy the money. We aren't going to have an argument.

The room is empty and clean. You have the keys in an enveloppe addressed to you on the kitchen shelf.

Finally, I would like to say that you have been a very unpleasant landlady, and your messages were usually quite aggresive without reason. I'm very happy to finish this relationship.

Have a good life, and take your pills...

Hi--- hope this correction helps :) 

Georgia

One of my favourite countries is Georgia. I have been to Georgia twice and will definitely visit this beautiful country again. 
My first visit was in new year 2013; i traveled alone and decided to book a hostel. Usually in hostels there is a lot of *fun and entertainment. It was a really cool time. I stayed in Tbilisi and traveled to different places.
Why am i so keen on Georgia? First of all, it's the people - hospitable, kind people who really enjoy their life. The second thing is nature - there are magnificent mountains, grapes, valleys as well as the Black sea. The third thing is culture - There are very plain**, ascetic and beautiful churches, monasteries. I also really love Georgian directors such as Paradzhanov, Abuladze, and Iosiliany. I presume, their works are similiar to the classic Italian directors. And, of course, Georgian food and wine is incredibly delicious!

*here, we can't say 'youth, fun and entertainment', as 'youth' is a physical thing, whereas 'fun and entertainment' are abstract. We can't use the same 'there is' to talk about both. 

**plain here has a negative meaning-- to be more positive say 'simple'

*here, we can't say 'youth, fun and entertainment', as 'youth' is a physical thing, whereas 'fun and entertainment' are abstract. We can't use the same 'there is' to talk about both. 

**plain here has a negative meaning-- to be more positive say 'simple'

Please correct my sentences

Hello all,

I have tried to make sentences (especially for business) using some phrasal verbs.

Could someone correct them or suggest better one?

1. branch out=expand...

branch out, we would use more in the context of trying new ideas. in this sentence, it wouldn't work like this, but here are some examples below:

Boots pharmacy company have branched out into selling cosmetics as well. 

I need to branch out and apply for jobs outside of IT. 

2. break into=enter

break into has two meanings, 

1) break into a house= enter, with force (i.e. burglary!)

2) (in business) break into new markets =enter, with force

We wouldn't use it like in the example to start something per say. It needs the idea that is needs power to break in, or force. 

But an example might be

1) The BBC tried to break into the American market by showing British programmes from other channels as well. 

3. carry on=continue

Yes- this one is fine-- just a few words different. 

Let’s carry on this discussion until the time is up. 

4. close down=stop operating

-this is also a great example, i just corrected the sentence

The management decided to close down the plant because strikes were happening on and off the past few years.

5. step down=resign

-another great example. we don't normally use present perfect with dates though (at least in British English-- I think it might be different in American but I'm not sure. Ask one!) 

Our general manager stepped down and a replacement has been assigned.

6. take up (something )=occupy

Good example-- we don't normally use agendas in plural, so I would say 'items' in the first instance. We have the phrase 'items on the agenda' as well. 

Many items took up the meeting time, so our proposed agenda was not discussed at all.

7. carry out =perform

Yes-all good. 

Can you prepare some materials for the presentation and carry it out at the meeting next week?

8. come up=happen

With 'come up', we would only really use it to refer to meetings or things that take time-- they stop you from doing something else. We mainly use it with future continuous tense.

e.g. 1) There is a big conference coming up tomorrow. 

In the past, I've only really heard it in this type of phrase-- i.e. 'something came up', we don't normally use it with specific things in the past. 

1) I wanted to be there, but something came up.

9. get on=make progress

--yes great! Just a minor correction to make it sound more natural :)

I got many calls from our customers today, so I could not get on with my work very easily.

10. keep up with=follow

Yes- excellent example

We have had a lot to do recently, so we are not keeping up with your task.

Thank you for your patience!

Hope this is useful for you! :)