Answer:
The correct answer is option D, that is, igneous rocks.
Explanation:
The volcanic or extrusive rocks, that is, the igneous rocks crystallize from lava at the surface of the Earth. The texture of igneous rock, that is, whether coarse-grained or fine-grained relies upon the rate of cooling of the melt. When the cooling takes place gradually or slowly the formation of large crystals takes place, and when the cooling takes place at a quicker rate small crystals are formed. Thus, the crystallization of igneous rocks takes place directly.
