Protected areas are an extremely important part of programs to conserve biodiversity and ecosystems, especially for sensitive habitats. there are two methods of biodiversity conservation: in-situ (natural home) or ex-situ (artificial home). all but one is an example of an in-situ method of conservation. that is a a) national park. b) botanical garden. c) wildlife preserve. d) wildlife sanctuary.

Correct B). Botanical garden

Ex-situ conservation is a process of preservation of biological diversity outside their natural habitats. It includes conservation of genetic as well as wild species living in that area.

Except, botanical garden rest all are the example of an in-situ method of conservation, which involves conservation of species in their natural or similar environment.

Hence, the correct answer would be option B.

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