Answer: (C) A hot spot
Explanation:
A hot spot is created in the volcanic peaks and it is basically developed over the plume. The mantle plumes are the areas of the up-welling and the hot mantle areas. Magma created by the problem area ascends through the unbending plates in the lithosphere layer.
It produces the dynamic volcano at the surface of the earth. In the mantle area, the hot spot are generated in which the rocks are get melted for generating the magma. The hot spot generated the heat are basically comes from the middle of the earth.
East Pakistan changed its name to Bangladesh, and it still has this name today, as it's an independent country. Desh means land, and Bangla is the language of people living there.