It seems like you've provided a series of questions and passage excerpts related to U.S. history, particularly regarding civil disobedience, economic expansion, and the impact of historical events like the Gold Rush and the Erie Canal. Here are the suggested answers based on the information given:
Question 14: How did Thoreau justify this act of civil disobedience?
Response: He objected to tax money being used to pay for the U.S.-Mexican War.
Question 15: How did the economic success of the Erie Canal impact westward expansion?
Response: There were more economic opportunities in the West due to the success of the canal system.
Question 16: How did the United States acquire the territory marked with the X?
Response: By purchasing the land from France.
Question 17: What can you infer about the Gold Rush’s impact on the city of San Francisco?
Response: The mass migration of forty-niners transformed San Francisco into an economic hub practically overnight.
Question 18: The innovation shown in this photograph most affect the U.S. economy by --
Response: allowing more efficient movement of goods.
If you have any more questions or need further assistance, feel free to ask!