Final answer:
Black Tuesday represented a stock market crash and marked the beginning of an economic recession or depression.
Step-by-step explanation:
Black Tuesday represented the part of the business cycle known as a stock market crash, signaling the beginning of an economic recession or depression. It specifically refers to the events of October 29, 1929, when the stock market experienced a significant decline, leading to widespread panic and the onset of the Great Depression. This event marked the end of the period of economic expansion and prosperity that characterized the preceding phase of the business cycle.
Learn more about Black Tuesday and the business cycle