The correct answer is: B. World Conservation Union.
IUCN stands for the International Union for Conservation of Nature. It is an international organization that helps to conserve the world’s natural resources. IUCN was founded in 1948 and is headquartered in Gland, Switzerland.
IUCN is also known as the World Conservation Union. This is because IUCN’s mission is to “influence, encourage and assist societies throughout the world to conserve the integrity and diversity of nature and to ensure that any use of natural resources is equitable and sustainable.”
The other options are incorrect. Option A, Man and Biosphere program, is a UNESCO program that aims to promote the conservation of biodiversity and the sustainable use of natural resources. Option C, World Conservation Consortium, is not a real organization. Option D, World Wide Conservation Union, is a common misspelling of IUCN.
I hope this helps! Let me know if you have any other questions.