Final answer:
Polish immigrants were commonly employed in manufacturing and mining, while Jewish immigrants worked in the garment industry and Italian immigrants in agriculture, among others. These industries were critical for the economic integration of immigrants in the United States.
Step-by-step explanation:
Polish immigrants commonly worked in industries such as manufacturing and mining. Specifically, they were active in the steel industry in cities like Pittsburgh and in the stockyards of Chicago. In comparison, Jewish immigrants were particularly prominent in the garment industry in places like New York City. Italian immigrants performed various jobs including working in agriculture, mining, and the building trades. These industries provided the immigrants with job opportunities that were accessible given their skills and the demand for labor at the time.
Understanding the kinds of work immigrants took is vital for comprehending the economic and social landscape of the period, as well as the contributions made by these diverse groups to the development of industries in the United States.