Question

what is the main use of tropical thorn​

Answer 1

The three characteristics features of the thorn forests and scrubs are:

The thorn forests are found in the regions which receive less than 70cm of rainfall.  

These forests are found in the semi-arid areas of Gujarat, Haryana, Madhya Pradesh, Chhattisgarh, Uttar Pradesh, and Rajasthan.

The trees of the thorny bushes have long roots that penetrate deep into the soil in search of water.

Leaves are thick and small to minimize evaporation. Some varieties of trees are acacias, palms, and cacti.

Answer 2

The thorn forest is a type of desert formation which has scrub like vegetation and they are mostly tropical and subtropical forests having trees and plants with armedthorns and spines the vegetation found here is often short and small with few tall trees set against the sparse ground where grass lacks.