Final answer:
Improvisation as a music therapy intervention is free and unpredictable. It allows clients to express themselves and develop new skills.
Step-by-step explanation:
The correct answer is c) Free and unpredictable. Improvisation as a music therapy (MT) intervention involves spontaneous musical expression that is not predetermined or scripted. It allows the client and therapist to explore and respond to the emotions, thoughts, and needs that arise in the moment. This approach can be highly beneficial in helping clients gain self-awareness, express themselves, and develop new skills.