Tropical deciduous forest trees shed their leaves to

The correct option is D Prevent loss of water
There are two types of forests depending upon the latitude, namely tropical and temperate forest. The forests are also classified on the basis of pattern and seasonality of their foliage growth into evergreen forest and deciduous forest. In India, the major forest type found is tropical deciduous forest. These are also called as monsoon forests. They shed their leaves to prevent loss of water and survive harsh environmental conditions.

Thus, the correct answer is 'Prevent loss of water.'