Biosphere Reserves are special entities (sites) for how human beings and nature can co-exist while respecting each other's needs. Biosphere Reserve is an area of active cooperation between the management and the local people, wherein activities like settlements, cropping, forestry, recreation, and other economic activities that are in harmony with the conservation goals.

B is wrong because People dont live in botanical gardens with plants.

C is wrong because, in the National park, human activity is totally prohibited.