Urban population increases

Recently I realized that urban populations have been increasing. It is very interesting for me to find answers to explain what causes this situation. I have come to three conclusions.

Cities provide more job opportunities than the country. The young people tend to only do physical work in the country. But in cities they can become a singer, dancer, painter, teacher, director and so on if they wish.

The high living standards of cities is very attractive to everybody. Cities have more high-level teaching teams, better hi-tech medicine, and more modern security systems than the country. In order to enjoy a high quality of life, people are willing to migrate to cities.

Now, farming requires few workers, not like before because the development of technology. I make an assumption that five farmers worked for a field by hand ten years ago, whereas today, just one farmer with an agricultural machine is enough. Therefore many young people do not have work to do.

The urban population surge is a quite complex problem. My conclusions are just a part of it.

Overall your writing is good, but I have made some corrections to "polish it up" and make it sound more professional.  Most of these are very minor mistakes.   However there are a few typical mistakes you should watch out for:

1.  Always have a gap between each paragraph.... you might need to press the Enter key on your keyboard twice, not once

2.  Try to avoid writing  "more and more".   If you use it correctly it can be ok, but most of the time people use this saying incorrectly.  It is better to avoid saying "more and more"  and think of different words instead.

3.  I have noticed a lot of people write  "apart"  when they actually should write  "a part".  The word  "apart" means "separated", but the words "a part" mean something like  "just one part of".