Question

Zoos help to protect endangered animals, so they are necessary for animal conservation.

Which piece of evidence, if true, would best support this claim?
Removing animals from the wild and placing them in zoos can contribute to the endangerment of their species.
Specialists can breed animals at zoos to help increase their population.
Many animals die prematurely in zoos because they are exposed to diseases.
Funding sources for zoos can be limited, and they often rely on donations from the public.