Final answer:
Stabilizing a joint allows the prime mover to act at more distal joints by preventing injury and maintaining stability, while also allowing for a greater range of motion in some cases.
Step-by-step explanation:
Each synovial joint of the body is specialized to perform certain movements based on their structural classification. While some joints allow for greater range of motion, they can also be weaker. To prevent injury and maintain stability, it is important to stabilize the joint so that the prime mover can act at more distal joints. This stabilization prevents excessive movements and ensures that the prime mover can effectively perform its function.