Final answer:
The event of the Great Depression illustrated downward social mobility as thousands of people experienced a decrease in economic status and moved to lower social classes.
Step-by-step explanation:
The event of the Great Depression illustrated downward social mobility.
During the Great Depression, thousands of people found themselves in a lower social class due to the economic downturn. Many lost their jobs and homes, and experienced extreme poverty and suffering. This resulted in a significant decrease in their economic status and social class.
Downward social mobility occurs when individuals move from a higher socioeconomic class to a lower one, often due to factors like unemployment, business setbacks, or illness.