How did immigration & industrialization facilitate americans imperial growth?

Immigration was certainly a key factor in the growth of America's economy . The Industrial Revolution came with massive technological developments, and the chance to exponentially improve the production rate of factories. However, to operate these emerging industries it would take a tremendous amount of laborers. American citizens working alone, weren't going to be enough. In other words, the peak of immigration influx allowed the U.S. to take full advantage of the possibility at the right time.

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the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism

this is a good question! i'll do some research and come back when i have the answer!