Answer:he mining industry was one of the industries that had great impact for the westward expansion in northamerica. Many people seeking wealth settled in western territories creating small mining towns. These towns were created when the existence of a gold deposit had already been proven but many times they were created only with the rumor that there could be gold there. They were prosperous towns at an economic level until the ore was depleted. Then they left the town. The timber industry began when settlers cut wood to build their settlements on American land. The westward expansion generated high demand for wood supply, which promoted the timber industry by strengthening the US economy. This industry grew by leaps and bounds and already in 1970, 41% of the timber in the United States came from the Pacific Northwest. During the era of the construction of the transcontinental railroad there was a dramatic expansion in agriculture. The number of farms tripled and the number of people living on farms increased to 31 million in 1905. Industrial agriculture favored the westward expansion since with the introduction of agricultural machinery farmers managed to increase crop yields with less labor. Farmers organized into local and regional cooperatives to promote their interests.
Hope this helps :)
William Clark
Lewis and Clark remember???
Answer: A B and C
that i the answer :DDDDDDDDDDDDD
<span>The cities of Chichen Itza and Tenochtitlan reveal that the civilization that founded them have advanced knowledge in architecture, mathematics, physics, chemistry and astronomy at the very least.
To create such proportional and seemless structures, civilization must have advanced mathematics in practice. And for those structures to stand not only the test of time but also the forces of nature requires specialized knowledge in both chemistry and physics. This leads to the conclusion that the people who planned the structures are not only priests or shamans but also engineers who like their modern counterparts are well versed in the sciences.
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