Hint: A biosphere reserve refers to an ecosystem with plants and animals of unique scientific and natural interest. A specialized agency of the United Nations (UN) that aimed to promote world peace and security, has given these ecosystems a label for protection.
Complete answer: The natural resources i.e. plants, animals, and microbes of a biosphere reserve possess unique scientific interests. The motive behind these reserves is to promote the management, research, education, and sustainable development.
Sustainable use of natural resources is a globally endorsed principle.
The practice has multiple dimensions which make it a complex idea.
So, The United Nations Educational, Scientific and Cultural Organization or UNESCO has created a concept to protect natural, wild areas. Hence, they labeled certain areas as the biosphere reserves for the protection of the natural resources of special interests.
So, the correct option is C. UNESCO
Note: Zoological Survey of India (ZSI) –It was founded by the Government of India (MOEFCC), in 1916. It deals with Zoological research and fauna-surveys.
International Union for Conservation of Nature and Natural resources (IUCN) – It is an international organization that deals with nature conservation and sustainable use of natural resources.