Final answer:
The growth of labor unions in the United States during the early 1900s was influenced by unsafe working conditions in large factories, low wages paid to immigrant farm workers, and increased unemployment rates in major U.S. cities.
Step-by-step explanation:
The growth of labor unions in the United States during the early 1900s can be attributed to several factors. One significant factor was the unsafe working conditions in large factories. Workers faced long hours, low pay, and dangerous environments, which led to frustration and a desire for change.
Another factor was the low wages paid to immigrant farm workers, who were often willing to work in poor conditions due to dire circumstances. Lastly, the increased rates of unemployment in major U.S. cities also played a role in the growth of labor unions, as workers sought collective bargaining power to improve their working conditions and wages.