Final answer:
The phrase "proximal stability creates distal mobility" exemplifies the need for a stable base like the pelvis to support the movement of distal body parts. The correct answer is D) Stable Pelvis, as it provides a strong foundation crucial for leg mobility.
Step-by-step explanation:
The phrase "proximal stability creates distal mobility" means that having a stable base or core allows the parts of the body farther away (the distal parts) to move effectively. For example, a stable pelvis acts as a foundation to support complex movements of the legs. The bones of the pelvis are highly united to provide a largely immobile, weight-bearing structure, which is essential for stability and the transfer of body weight through the lower limbs. A mobile shoulder blade (scapula) and shoulder joint, by contrast, allow for a greater range of upper limb movements.
The correct answer is thus D) Stable Pelvis. A strong pelvis provides stability to the lower body, which in turn supports mobile functions like walking, running, and other activities that involve the legs and feet.