What describes the ensemble heard in the introduction of billie's blues?

Question: What describes the ensemble heard in the introduction of billie's blues?

The ensemble heard in the introduction of Billie's Blues by Billie Holiday typically consists of a small jazz combo. This includes instruments like the guitar, bass, piano, and drums, which create a steady rhythm and harmonic foundation. The introduction sets a laid-back and soulful tone, characteristic of blues and jazz music, providing the perfect backdrop for Billie Holiday's expressive vocal delivery.