Rock forms from the crystallization of magma or lava a. igneous b. sedimentary c. metamorphic

A - Igneous

Sedimentary rocks are formed through sediments while metamorphic rocks are formed through compression of great pressure and heat.

Igneous rocks are known for forming from lava or magma.

Hope this helps!

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.