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.
There were several major causes of the Great Depression in the United States. 1. Unequal distribution of wealth. There was not a large middle class. While wages were rising foâ¦r the majority of workers, they were not keeping pace with the increase in the cost of living or the wealth in the hands of the industrialists and others in the upper income classes.