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 still cannot agree on what caused the Great Depression. Most however have agreed that it was a combination of events and decisions that came into play that caused the Great Depression. Stock Market Crash of 1929. The Wall Street Crash of 1929, is cited as the case of the Great Depression. However, while it does share some of the blame the crash ruined peopleâs fortunes and destroyed confidence in the economy. However, most believe that the crash alone would not have caused the Depression. World War One. After World War One (1914-1918) many countries struggled to pay their war debts and reparations as Europe began to rebuild.