Question

Which texture best describes an igneous rock that formed deep underground?

Answer 1

Coarse grained is the texture which best describes this rock which was formed by the cooling and solidification of lava or magma. This kind of rock can form by crystallization. When the rock is formed by crystallization we get the granular rocks while if they are formed without crystallization they are in form of natural glasses. 

Answer 2

Answer:  Igneous rocks are formed by the cooling and solidification of lava. They may form by the crystallization of granules. Without crystallization they form natural glasses. The texture that best describe the igneous rock is coarse grained. The mineral grains are easily visible and appears several millimeters in size or larger than that also. Andesite, basalt, extrusive, diorite are some examples of  igneous rocks.