Final answer:
Industrialization in the United States during 1865-1900 spurred the rise of unions to demand better wages and conditions for workers.
Step-by-step explanation:
The industrialization in the United States during 1865-1900 spurred the rise of unions to demand better wages and conditions for workers. As industrialization brought about the growth of cities and the rise of industrial giants like Andrew Carnegie and John D. Rockefeller, workers faced exploitative conditions and low wages. In response, workers formed labor unions to collective bargain for better pay, working hours, and overall conditions in the workplace.