A zone of biosphere reserve allows human activities. Mention it along with other zones.

Biosphere reserve is divided into three zones which are as follows:

i. Core zone: It is the innermost zone of biosphere reserve in which human intervention is allowed and is highly protected. It is strictly regulated.

ii. Buffer zone: This zone is between the innermost and the outermost zone. Human activities except research are not allowed here. Human intervention only for research is permitted here.

iii. Transition zone: It is the outermost zone of the biosphere reserve in which human activities are permitted.

Following picture depicts the different zones of Biosphere: