Final answer:
The stock market crash of 1929 led to the closure of many banks, resulting in a severe economic downturn known as the Great Depression.
Step-by-step explanation:
A long-term effect of the stock market crash was that many banks were closed. This happened because when the stock market crashed in 1929, it caused widespread panic and financial instability. As a result, people started withdrawing their money from banks, causing many banks to fail. The closures of banks led to a severe economic downturn, known as the Great Depression, which lasted for a decade and had a significant impact on the lives of people in the United States.
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