Final answer:
The United States adapted to handle the increase in people living in the country through urbanization, immigration, and integration.
Step-by-step explanation:
The United States adapted to handle the increase in people living in the country through various measures. 1. Urbanization: As industrialization brought more job opportunities in cities, workers left rural areas and moved to urban centers. This migration caused the population of cities to grow rapidly. 2. Immigration: The United States attracted immigrants from around the world, who came to the country in search of better opportunities and jobs. This influx of immigrants contributed to the increase in the population. 3. Integration and Assimilation: Over time, immigrants and other newcomers assimilated into American society, learning English and adopting American customs and values. This process helped to integrate the growing population into the country.