Which of the following best explains why geographic regions were created?
a.
to define political boundaries
b.
to organize and interpret the earth's physical and cultural similarities and differences
c.
to create boundaries that limit the interactions between different cultures
d.
to people more easily find groups that share similar beliefs and ideals in order to minimize conflict among different groups

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.