(1) Western Ghats Explanation: A biodiversity hotspot is a region with a significant reservoir of biodiversity that is under threat from humans. More like rolling hills than snow-covered mountains, the Western Ghats - stretching some 1,600 km from the north of Mumbai to the southern tip of India - are a biodiversity hotspot that contains a large proportion of the country's plant and animal species; many of which are only found here and nowhere else in the world.