Explanation:

When we conserve and protect the whole ecosystem, its biodiversity at all levels is protected - we save the entire forest to save the tiger. This approach is called in situ (on-site) conservation. However, when there are situations where an animal or plant is endangered or threatened (organisms facing a very high risk of extinction in the wild in the near future) and needs urgent measures to save it from extinction, ex-situ (offsite) conservation is the desirable approach.

• Examples of in-situ conservation methods are biosphere reserves, national parks, sanctuaries, and sacred groves.
• Examples of ex-situ conservation methods are Zoological parks, botanical gardens, and wildlife safari parks.