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.
A significan cause of the Great Depression of the 1930's was that. some banking policies were unsound and had led to the over expansion of credit. An important factor contributing to the start of the Great Depression in the US was the. uneven distribution of wealth.