Hi Daniela, 

Some corrections from my end as below. Overall, it is well written and good effort! Hope my corrections are helpful. 

help!! Can someone check this paragraph please??

This paragraph is about cons of zoos, so previously I mentioned the pros
this is the conclutive sentence: "to conclude, zoos have been a target of criticism for many through years; nevertheless, they have contributed to and promoted animal conservation and protection."

And this is the second paragraph (please check my puntuaction, structure ideas and right use of words and connectors, also if it makes sense).
"Currently, the world population is concentrated mostly in urban areas, separating us from nature more and more. Therefore, zoos have become a good alternative to connect nature with the us human beings. However, there are many people that reject this these places due to the contraindications contradictions they can imply  bring. For example, zoos are supposed to promote animal preservation, but they also promote animal abuse. The 95% of the animals of in zoos in Colombia aren't on the endangered list; according to other researches as well, the 97% of the animals of the Zzoos in England aren't part of the European Captive Birth Program (EEP's). Then Furthermore, these animals are taken out from their natural habitats to be part just of the human amusement. As a result, another implication is the difficulty of returning these animals back to their habitats once they are in captivity. That privilege is given to those animals in danger; as was the case of the snail Partula, the English field cricket, the horse Przewalski and the wild rat Dormouse, who were successfully reinserted in  nature back into the wild, whilst those animals that aren't endangered and are subdued till their death entertaining humans. It can also generate an imbalance in the ecosystems. Ultimately, another negative aspect is the behavioral changes that these animals can develop. Most of the zoos don't provide suitable establishments for the animals, as they are being confined in uncomfortable cages. The stress, the poor simulations of nature and the poor encouragement of hunting and surviving can generate a big impact on their lives, thus they can develop mental problems and also genetic alterations. In resume The big question is, which is supposed to be the main objective of a Zzoo? Although they have changed a little bit the focus of the exhibition, they need to be more responsible and more conscious about animals lives. They feel as we do, they need love as we do and they also deserve the same rights as we do."