What are the things that affect or create the earth's weather and climate ?

a substance in a physical state in which it does not resist change of shape and will expand indefinitely to fill any container.

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hope this !

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.

i think the answer to your question is: settlement of the interior and economic growth. ( ^_^)／