Explanation:

all the above 

Biosphere Reserve (BR) is an international designation by United Nations Educational, Scientific and Cultural Organization (UNESCO) for representative parts of natural and cultural landscapes extending over large areas of terrestrial or coastal/marine ecosystems or a combination of both. Biosphere Reserves tries to balance economic and social development and maintenance of associated cultural values along with the preservation of nature. Biosphere Reserves are thus special environments for both people and nature and are living examples of how human beings and nature can co-exist while respecting each others’ needs.