Final answer:
During the Gilded Age, the United States underwent significant changes, most notably the rapid urbanization as people moved from rural to urban areas, contributing to economic growth and increasing the divide between rich and poor.
Step-by-step explanation:
The United States change drastically during the Gilded Age, as it transitioned from a primarily agricultural society to one dominated by industry and urbanization. By the early 1900s, the shift from a rural, agrarian society to an urban, industrial one was evident, with many Americans leaving farms in search of employment in the growing cities. The population grew very rapidly, and many people moved to urban centers, contributing to the rise of cities as economic and cultural hubs. This turn towards urban living also marked a growing divide between the wealthy and the poor, with the concentration of affluence and poverty becoming more pronounced in urban areas.