Captive breeding has helped revive wildlife such as the Eurasian beaver, the cheetah and the Arabian Onyx. Several species have been reintroduced into locations in order that the ecological balance is restored. When herbivorous bandicoots were set free in the wild, they dug the ground and redistributed dry leaves and branches, reducing the chance of bush fires. But some predators may overhunt or threaten other vulnerable species. _____________

The paragraph talks about how captive breeding has helped revive wildlife, and how the subsequent reintroduction of species has helped restore the ecological balance. It mentions bandicoots as having reduced chances of bush fires by redistributing dry leaves. And finally mentions how some predators might be threatening or overhunting organisms such as bandicoots who protect the ecosystem. 

Option A mentions conserving herbivores, which has not been discussed, not to mention that even herbivores might be threatening some plant species. Option B is also not a sensible continuation as the complexity surrounding conservation of carnivorous animals has not been discussed. Option D contradicts the last line of the paragraph, which mentions predators who overhunt species, by saying that all animals, including carnivores like these, should be revived and allowed freely to live. Option C is the only logical continuation after the discussion of the eating habits of bandicoots and the eating habits of predators.