Final answer:
Working conditions in the U.S. have improved from long hours and low wages due to the labor movement, which pushed for better labor standards and working conditions unlike in lower-income countries where such standards may still lag.
Step-by-step explanation:
Working conditions in the United States have changed significantly over time. In the past, employees in mills and factories were subjected to long hours of labor with meager wages, lack of rights to unionize, and hazardous conditions. This environment prompted the rise of the labor movement, which fought for workers' rights and improved standards. Over time, labor standards in the U.S. evolved, resulting in better working conditions, such as reduced working hours, improved safety regulations, and the establishment of minimum wage laws. These changes contrast with lower-income countries, where there may still be fewer legal protections, and economic pressures can result in poorer labor standards.