What major trend occurred to the population of the US during the industrial expansion of the late nineteenth century?

During the industrial expansion of the late nineteenth century, the U.S. population experienced significant growth due to a combination of high birth rates and an influx of immigrants. Millions of people, particularly from Europe, migrated to the U.S. seeking job opportunities in rapidly developing industries and urban areas. This urbanization led to the growth of cities, transforming the demographic landscape and contributing to a diverse societal fabric. Additionally, the population shift from rural to urban settings marked a fundamental change in American life and economy.