The two richest Ecozones of India are – (1) The Himalayas and Vindhyas (2) The Himalayas and Eastern Ghats (3) The Himalayas and Western Ghats (4) The Himalayas and Aravallis
(3) The Himalayas and Western Ghats Explanation: The Himalayas and, the Western Ghats are known for rich biodiversity they support. Several species of ciidemic plant and animal are found in these zones. After Africa, Indian peninsula has the richest diversity of life forms on the face of the Earth.