Final answer:
The primary causes of changing demographic patterns resulting from domestic migration and immigration in the United States were push and pull factors, such as economic opportunities and political instability. These changes impacted the way Americans worked and lived by contributing to industrialization, urbanization, and the growth of cities.
Step-by-step explanation:
The primary causes of changing demographic patterns resulting from domestic migration and immigration in the United States include push and pull factors. Push factors are circumstances and conditions that make people want to leave their current location, such as lack of economic opportunities or political instability.
Pull factors, on the other hand, are attractions in the destination that draw people to move there, like job opportunities or better living conditions.
These changing demographic patterns have had a significant impact on the way Americans work and live. For example, the influx of immigrants in the late 19th and early 20th centuries played a vital role in the industrialization and urbanization of the United States.
Immigrants often took jobs in factories and contributed to the growth of cities. Additionally, large-scale domestic migration towards urban areas has also transformed American society, as people moved from rural areas to cities in search of employment and a better life.