Answer:
Owing most of their population growth to the expansion of industry, U.S. cities grew by a lot During the final years of the 1800s, industrial cities, with all the problems they had.
Explanation:
By the late nineteenth century, the United States had become a leading global industrial power, building on new technologies (such as the telegraph and steel), an expanding railroad network, and abundant natural resources such as coal, timber, oil, and farmland, to usher in the Second Industrial Revolution.
