Which statement best describes the formation of an intrusive igneous rock? here are the choices:
a. magma solidifies slowly, resulting in a coarse-grained texture.
b. magma solidifies slowly, resulting in a fine-grained texture.
c. magma solidifies rapidly, resulting in a glassy texture.
d. magma solidifies rapidly, resulting in a clastic texture

The correct answer is - A. Magma solidifies slowly, resulting in a coarse-grained texture.

The intrusive igneous rocks are forming when the magma solidifies very slowly, deep underground, under higher temperatures and pressures. All these conditions contribute to the coarse-grained structure to form on these types of rocks and have it as a trademark. These rocks are very hard rocks, with big density, their colors vary a lot but are more on the dark side usually. Some of them are diorite, granite, pegmatite...

the first phase of the government’s plan for settlement was building the transcontinental railroad. the railroad provided a way to bring settlers and manufactured goods west and ship their agricultural and mining produce east. the transcontinental railroad was an essential artery for rapid development of the frontier.

the second phase of the government’s plan was a liberal land distribution policy that made it possible for many people to homestead. with these two key elements—transportation and cheap land—the government rapidly achieved its goal of persuading people to move west, settle on farms, and push back the frontier.