Final answer:
The drum set is a key instrument found in a jazz rhythm section along with piano, string bass, and guitar.
Explanation:
The drum set is the instrument usually found in a jazz rhythm section. It plays a crucial role in providing the rhythmic drive and maintaining the beat in jazz music.
Piano, string bass, and guitar are other common instruments in a jazz rhythm section that provide harmonic support and contribute to the overall sound of the ensemble.
Jazz music relies heavily on the collaboration and interaction within the rhythm section to create the groove and foundation for improvisation.
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