Thank you very much. Here are the last sentences of the day.
1) Please, use Italian when emailing our science teacher so she won't have problems in understanding.
2) Many people believe it is inhumane to keep animals in captivity. Others, on the other hand, belive that zoos play an essential role in protecting and preserving natural wildlife from cruelty and exploitation.
3) They also contribute to creating ecological awareness and encourage people to respect and value animals.
4) Poachers continue poisoning waterholes and using white tigers' body parts in traditional medicine
1. no comma needed
Everything else is fine.