Explanation:

• Tropical Evergreen forests are found in the western slope of the Western Ghats, hills of the northeastern region and the Andaman and Nicobar Islands. • They are found in warm and humid areas with an annual precipitation of over 200 cm and mean annual temperature above 22 degree C. • The Western Ghats in India provide favorable conditions for orographic rainfall. The warm and moist air from the Arabian sea is blocked by the Western Ghats and gets lifted over mountain ranges. As the air rises and cools, orographic clouds are formed resulting in precipitation. o Due to orographic rainfall, the western side of the western ghats receives heavy rainfall, more than 250cm rainfall per year. and aids in growth of Tropical evergreen forests in India. • These forests can be extremely dense and multi-layered, with a few areas being so dense that the forest floor hardly receives any sunlight due to the engulfing leaves and large trees. • The main vegetation found in these forests is Ebony, Mahogany, and Rosewood. • The tropical evergreen forests are known as lungs of the Earth because of huge greenery and the amount of oxygen they produce. The plants usually draw carbon dioxide and produce oxygen, hence are called as the lungs of the Earth. • Hence, option (a) is the correct answer.