Why has India a rich heritage of flora and fauna?

Solution:

India has all the major physical features of the Earth, i.e., mountains, plains, deserts, plateaus and islands. The different regions of the country have different soil types. Though India has an essentially monsoon-type of climate, there exists great variations in humidity and temperature across the country. Even the rains brought by the monsoon winds are unevenly distributed. Hence, each factor responsible for the type of flora and fauna in an area, namely land, soil, temperature, humidity and precipitation, are variable across the length and breadth of the country. As a result, the flora and fauna found in India is diverse and rich.