Select the example of Ex-situ conservation from the following :

The correct answer is Option (3) → Botanical garden

Ex situ conservation protects threatened plants and animals outside their natural habitat, in special settings. In situ conservation protects them in their natural home.

Option (1) National park — Incorrect. A national park protects the whole ecosystem where it is: in situ.

Option (2) Sacred groves — Incorrect. Forest patches kept untouched for religious reasons, such as those of the Khasi and Jaintia Hills, are in situ conservation.

Option (3) Botanical garden — Correct. Ex situ conservation means protecting a species away from its natural habitat. A botanical garden grows threatened plants in a special setting where they are cared for, so it is ex situ; national parks and sacred groves are in situ.

Option (4) Biosphere reserves — Incorrect. Biosphere reserves protect large natural areas: in situ.

NCERT Extract:
How Do We Conserve Biodiversity? – “… Ex situ Conservation– In this approach, threatened animals and plants are taken out from their natural habitat and placed in special setting where they can be protected and given special care. Zoological parks, botanical gardens and wildlife safari parks serve this purpose.”