Final answer:
A bebop performance generally began and ended with a musical introduction called a-head. The head is played by the entire band, with each musician taking turns playing the melody or a variation of it.
Step-by-step explanation:
A bebop performance generally began and ended with a musical introduction called a-head. The head is essentially a composition, often a popular standard, that serves as the starting point for the improvisations that follow. It is played by the entire band, with each musician taking turns playing the melody or a variation of it. The head is then repeated at the end of the performance, providing a sense of closure and bringing the piece full circle.