Final answer:
African Americans created jazz music as a response to exclusion from classical and popular music. Jazz incorporated blues, ragtime, and improvisation to create a distinct and innovative sound that became popular in the 1920s.
Step-by-step explanation:
Jazz music was created by African Americans as a response to the exclusion they faced from European classical music and popular Big Bands during the 1920s. African American musicians in places like New Orleans and Harlem developed a new style of music that reflected the experiences of black communities. Jazz incorporated elements of blues, ragtime, and unique rhythms and improvisation, creating a distinct and innovative sound. It became popular in cities like New York and eventually spread internationally, making it a truly American music genre.