Cnidaria is a phylum within Kingdom Animalia which consists of hydras, jellies (or jellyfish), sea anemones, and corals. All cnidarians are radially symmetrical, and there are two main radially symmetrical body types.
The stock market crash, on black Tuesday (October 29, 1929) began the Great Depression.
Economists continue to study the Great Depression because they still disagree on what caused it. nation as to why the Depression happened or why the economy eventually recovered. The 1929 stock market crash often comes to mind first when people think about the Great Depression. The crash destroyed considerable wealth. Perhaps even more important, the crash sparked doubts about the health of the economy, which led consumers and firms to pull back on their spending, especially on big-ticket items like cars and appliances. However, as big as it was, the stock market crash alone did not cause the Great Depression.