IUCN is an International Union for Conservation of Nature, and It assesses the biological species in the world which are at risk of extinction. IUCN mainly aims to focus on the preservation of the world’s species to decrease species extinction. IUCN mainly focuses on the Extinct, Extinct in the wild, Critically endangered, Endangered, Vulnerable, Near threatened, The Least concern, Data deficient type species.

The collection of different organisms in an ecosystem is called biodiversity, and it is used to explain the enormous variety of life on Earth. The act of total disappearance of the species is known as the extinction of species and currently, IUCN is working on the preservation of extinction because the extinction of species causes biodiversity loss.