Four of the world’s biodiversity hotspots fall in India. Which of the following factors are considered for a place to become a biodiversity hotspot?

a) Number of total species
b) Number of unique species
c) Number of species at risk
d) All of the above

Ans- [D]

Explanation:A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is under threat from humans. To qualify as a biodiversity hotspot, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.

Endemic species are species which are unique to a defined geographic location.