Which of the following is not an example of ex-situ conservation? Choose the correct answer from the options given below:

In-situ conservation protects species within their natural habitats, and these three are not examples of ex-situ methods.

A national park conserves wildlife in its own natural surroundings, making it in-situ.

A wildlife sanctuary likewise protects species in place, so it is in-situ conservation.

A biosphere reserve safeguards whole ecosystems on site, again an in-situ approach.

A zoo and a botanical garden, by contrast, keep animals and plants away from their habitats, which is ex-situ conservation.

Gene banks and seed banks are further examples of ex-situ preservation.