Why were so many people losing their jobs during the great depression? Why was it so hard to find jobs?

The great depression started because of a stock market crash. meaning economy will go down quickly. As companies started losing money they could not pay there employees enough. Employees then started quitting there jobs or low food supply made them hungry tired and weak. For the survivors that needed money had to get jobs though it was difficult because companies could not pay enough. People had to grow there own crops and get there own water to survive.