Which one of the following is the world’s richest region from a marine biodiversity perspective, comprising twenty-one islands with estuaries, beaches, forests of the nearshore environment, sea grasses, coral reefs, salt marshes and mangroves?
1
Gulf of Mannar Biosphere Reserve
2
Nanda Devi Biosphere Reserve
3
Sunderbans Biosphere Reserve
4
Nilgiri Biosphere Reserve