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 trigger event for world war 2 was when Hitler tolk over Poland. He also mass murdered millions of Jews and handycap people many people say there will be another Hitler one â¦ day that will come to kill Americans. 1 person found this useful.