Сhoose the right variant to complete the gaps

Animal species are disappearing from our planet fast. Scientists believe that 50 animal species are being wiped ... in the wild every day. This happens because they lose their natural ...
. Some people say that the only way to ...
endangered animals is to place them in a zoo. They claim that zoos keep the animals safe from harm and help ... their numbers. On the other hand, other people say that zoos can't ... an animal's natural habitat. That's why we need to focus on protecting their natural environments in the wild.
In my opinion, it is difficult to say what is best for our animal friends. I believe that ... work should be done to protect animals' natural habitats. If we all give a ... , we can work wonders!