Which is Bio-diversity rich place in India ?

The correct answer is A) Western Ghats. The Western Ghats is one of the world's recognised biodiversity hotspots and is inscribed as a UNESCO World Heritage Site (2012). It holds a large number of flowering plant, amphibian, reptile and bird species, and a high share of them are endemic, meaning they occur nowhere else.

• B) Eastern Ghats: These hills are discontinuous, broken by river valleys, and have far lower endemism and species richness than the Western Ghats. They are important but not the country's richest zone.
• C) Thar Desert: An arid region with sparse vegetation and limited species diversity. Its organisms are well adapted to harsh conditions, but the area is not biodiversity-rich in the sense this question means.
• D) Bay of Bengal: A large marine body with productive waters, but the question's framing points to a biodiversity-rich place. Marine richness here is concentrated in specific areas such as the Andaman and Nicobar Islands and the Sundarbans, not the open bay as a whole.

The concept is biodiversity hotspots and endemism. For Mains, connect this to the Western Ghats Ecology Expert Panel (2011) and the Kasturirangan report (2013), which debated conservation against development pressures in the region. Note that the Western Ghats is a shared landscape across several states.

Trap: Candidates confuse the Eastern and Western Ghats because the names are similar. The Western Ghats is the one with high endemism and hotspot status.