Задание

Fill in the gaps

Human population expansion and the effects of hunting are threatening many to such an extent that they are almost . In order to them, many animals are kept in in zoos and safari parks. The idea is that when animals are able to in safety, their numbers will increase enough so that some can be into their habitats. Some extreme animal rights activists, however, believe that it is better to allow a species to become extinct than to them in a prisonlike zoo.