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.
The Stock Market Crash in October 1929 is remembered by Americans as the trigger for the Great Depression. However, much of the rest of the world have been in a depression lon â¦ g before that. Nova Net Answer: Stock prices crashed when millions of shares of stock were sold.