In the US during the late 1800s a major population trend was the?

In the late 1800s, a major population trend in the U.S. was the rapid urbanization of cities, as millions of people migrated from rural areas and from abroad in search of jobs and better opportunities. This period saw a significant influx of immigrants, particularly from Europe, leading to the growth of industrial centers. Additionally, the expansion of the railroad system facilitated this movement, connecting urban areas and allowing for greater economic development. Consequently, urban populations swelled, transforming the social and cultural landscape of the country.