Write four sentences about what you know about how urban areas grew in the United States in the late nineteenth century and what the effects of these changes were on
American life.

Here’s one sorry Industrial expansion and population growth radically changed the face of the nation's cities. Noise, traffic jams, slums, air pollution, and sanitation and health problems became commonplace. Mass transit, in the form of trolleys, cable cars, and subways, was built, and skyscrapers began to dominate city skylines.

They showed the country that integration could be successful.