Very good question. When we use the simple past, "What movies did you see?" we are asking what movies you saw at a particular time, for example at a film festival or on the weekend. When we use the present perfect "What movies have you seen? we are asking what movies you have seen in the past generally. cheers!!

Both are correct and natural, it just depends on what word you want to stress importance. The first sentence is written in the active voice and the word 'plants' is the subject that is doing the action. The second sentence is written in the passive voice and we use this form when we want to focus attention on the person or thing affected by the action, in this case the fountain.

Question, please!

''Dumping'' as a noun, is it countable or uncountable?
Thank you very much!!

Dumping is an uncountable noun.  See this link.... http://www.learnersdictionary.com/definition/dumping

Article

The aim of this research is to discover the effect that some types of images have on the extent of attention of university students to online graphic messages that expose the social-ecological crisis. In order to achieve this end, the participants will be exposed to graphic advertisements of environmental responsibility and their attention will be measured through web analytics programs. The methodology used is a natural-type quasi-experiment, in which several environmental advertising messages are presented to the participants and the subjects are instructed to observe the ad and decide when they want to stop viewing it. The data obtained were will be analyzed statistically with the Students' T test and ANOVA.

Among The results highlights the extent of attention to the types of messages with shock aesthetics, in addition to the announcements that involve the recipient, identifying themselves with the message and its characters. In terms of the effectiveness of the graphic messages that address the social-ecological crisis, the images that capture the attention are those that contain elements that impact and involve the receivers.

Excellent writing, I've made a few small corrections and suggestions to sound more natural.

The use of the word 'data' as a plural would normally require the verb 'be' to be conjugated in the plural form as you have done, however it is more commonly used in the singular.  eg, the data obtained was analyzed. The latter is technically incorrect but with extensive use, it is now commonly considered correct. The word data has, over time, become a non-countable noun like 'money'. eg, the money 'was' spent.'  Of course if you are writing a formal paper and your readers are pompous intellects, you may want to stay with the former.

In any case, I suggest changing the past tense 'were' to 'will be' in order to be consistent with the second sentence in the first paragraph.  'the participants will be exposed to graphic advertisements'

Also, the spelling of the word 'analyze' is the American spelling, so if your readers are Americans, you're fine. If your readers are from all other English speaking countries, they will probably cringe. :)

I hope this is helpful. 

Fallas

Between the 15th and 19th of March, annually, Valencia celebrates the Fallas.
The thrird largest city in Spain fills its streets with amazing and colorful papier maché sculptures which it will become to ashes during "la nit de la cremà" (the night of the burning).
Every year thousands of tourists visited aour beautiful city, indulging the palate with a tasty paella in on the beach's shore and enjoying the incredibly high temperatures at that time of year.
Currently, this festivity has become a very important tourist attraction, since has being cataloged as a festival of International Tourist Interest.
Fallas also has a religious component because the festivities are celebrated to honouring St.Jhon, the patrón saint of the city. During this these weeks, hundreds of "falleras" offering bunches of colorful flowers to our Lady, which are used to make a very special cape for the Verge.
As a special events to close the week of the local festivity are, "la nit del foc" (the night of the fire), where an amazing work fires fill the Valencia's sky, and "la nit de la cremà" (mentioned before), as a final culmination of the party.

Excelente! Solomente algunos errorcitos

Here's an interesting article on that mantra and a good reading exercise for English learners.

http://www.slate.com/articles/technology/technology/2014/01/do_what_you_love_love_what_you_do_an_omnipresent_mantra_that_s_bad_for_work.html

The conditionals are not really that different in Spanish and English. Here's some examples: Zero Conditional, expresses outcomes when an action happens. You can usually use the word when/cuando in place of if. Si tomo vino, me prendo. / When I drink wine, I get tipsy. Notice that the present tense is used in both languages. First Conditional: If you study a lot, you will learn quicker. / Si estudias mucho, aprenderás más rápido. Notice the use of 'will' in English to talk about a future outcome. Second Conditional: Second conditional expresses possibility in the future if something imaginary happens. It's speculation. Si fuera rico, te compraría un carro rojo. / If I was rich, I would buy you a red car. In the 'if' clause, we use the simple past 'was' (in Spanish, you use the subjuntivo imperfecto, 'fuera') In the second clause, we use the modal verb 'would + verb' or 'would buy' ( in Spanish, you use the conditional tense, 'compraría' )

I learned that a lot of the words in Spanish that end in 'ma' are of Greek origin and for that they are treated as masculine nouns. Of course there are some exceptions like 'alma', which can be masculine or feminine, depending on the context.

El agua, el aguila, are really feminine nouns that just use the masculine article to avoid the awkward pronunciation as in 'la agua'.