The political boundaries of the U.S changed from 1845 to 1853 by increasing the territory and getting land as far out as California because the Americans fought the Mexican American war (1846-1848) that resulted in Mexico yielding the area we know as the Mexican cession have a nice day (:
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they raised goats and sheep because they could climb the mountains. they Also planted crops and took over other lands so they could develop the land
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People were forced to live a nomadic lifestyle due to the rocky terrain and deserts. People were unable to remain in the highlands during the winter due to the harsh climate. People were forced to abandon their settlements due to a lack of basic natural resources. Explanation:
