Final answer:
The most direct result of human migration due to industrialization was an increase in urbanization, as more people moved to cities like Detroit and Chicago for factory jobs, leading to urban growth.
Step-by-step explanation:
The most direct result of human migration due to industrialization, as witnessed in cities like Detroit and Chicago, was an increase in urbanization. Industrialization drew workers from rural areas to the cities in search of factory jobs, which led to the rapid growth of urban areas. This migration resulted in a major shift in population from the countryside into burgeoning cities, transforming the socio-economic landscape of the United States. The influx of workers into urban areas fueled the expansion of urban infrastructure and services, increased the concentration of the labor force, and changed the dynamics of economic and cultural life within cities. This process was essential in the transition from an agricultural to an industrial economy.