To carry out complementary activities of nature conservation and use of

natural resources, biosphere reserves and organised into 3 interrelated zones...

They are known as:

(1) core area

(2) The buffer zone

(3) Transition area

(1) core area: core core area is a part of a range in which an animal or

group of animals may rest securly, in which young may be raised, and to

which in some species, food may be taken to be eaten.....

It is likely to be defended against members members of same species.

(2) The buffer zone: a a neutral area of land designated two separate

hostile forces or Nations.

(3) Transition area: A portion of a landscape area that is adjacent to a natural

or undisturbed area and is designated to ensure that the natural gas remains

unaffected by planting and irrigation installed on the property.

hope it helps you friend!