The part of China that has the most attractive qualities for human settlement, and therefore the greatest population density is.. the Gobi Desert, on the China, Mongolian border area.

Eastern China which has humid continental and humid subtropical climates (much like the eastern United States).

the high, windswept, yeti-haunted, cold Plateau of Tibet.

northwest China, where one finds desert climate and desert scrub vegetation.

an angle + its complement = 90 degrees

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.