Answer:
Diversity is a synonym for variety - the art of the twentieth-century is very different from each other. New types of music were forming, with people taking many different directions and writing what their hearts told them. New genres, instruments, and concepts were created as a way to dominate the world and even create a new era. As the twentieth-century went on, each type of music was placed into its own decade to help people today know what music is their favorite. And every decade has different styles of music, therefore, diversity is the appropriate keyword for twentieth-century arts.
Step-by-step explanation: