Final answer:
Vaudeville is a form of musical entertainment popular in the 1920s that features a light, comic story and popular music.
Step-by-step explanation:
The form of musical entertainment that emerged in America in the 1920s and features a light, comic story interspersed with popular music is called vaudeville. Vaudeville shows were a type of variety show that became extremely popular during this time period. They typically included sketch comedy, music, and burlesque dancers.