Answer :
In the context of acid jazz style, it heavily relies on **c. Modal improvisation** and **d. Collective improvisation**.
1. **Modal improvisation**: This technique involves improvising within a specific musical mode or scale rather than adhering strictly to a chord progression. It allows musicians to explore different melodic and harmonic possibilities within a modal framework, adding a unique and creative element to the music.
2. **Collective improvisation**: In acid jazz, collective improvisation occurs when multiple musicians improvise together, creating spontaneous and interactive musical conversations. This collaborative approach fosters a sense of unity among the performers and often results in dynamic and engaging musical performances.
By incorporating modal and collective improvisation techniques, acid jazz style achieves a distinctive sound characterized by experimentation, spontaneity, and a fusion of different musical influences. These improvisational elements contribute to the genre's vibrant and eclectic nature, making it a popular choice for both musicians and listeners seeking innovative and expressive music.
