Which was a direct cause of the Great Depression?

The stock market crashed

Explanation:

A stock market crash is a sudden dramatic decline of stock prices across a significant cross-section of a stock market, resulting in a significant loss of paper wealth, which made many poor.

Loss of money which made food water and shelter harsh to get considering how many people there was then. Lots of people lost loved ones but the this everyone lost was their homes or the place they called home