Answer: The classical arts of the Twentieth century differ because many genres were created during this time period. Therefore, the keyword for Twentieth Century classical arts is diversity. Rock, some jazz songs, rap, and more were created by mixing genres of past eras. Every genre has its special history to be told. Some genres got their start in the 19th century but really became well-known in the twentieth century. Through all the accumulation of events belonging to this century, it was possible to find new combinations and instruments that work together. A twist on the beats played and a certain emotion to each song, most of them adding lyrics where people would sing. Some of these genres had connections, but don't forget, they were still different genres. Therefore, diversity is the keyword for Twentieth Century classical arts.