Which landforms are part of the Southwest region of North America such as in California, Arizona, Texas, and parts of Mexico? Select four options. Great Basin
Great Plains
Sonoran Desert
Mojave Desert
Rocky Mountains

Rocky Mountains Mojave desert and Great Basin

Explanation:

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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.