Final answer:
The trapezius muscle is not connected to the foot and is not triangle-shaped; it is a large, flat muscle that supports the trunk and helps in scapula movement.
Step-by-step explanation:
The correct answer to the question about the trapezius muscle is that it is not connected to the foot, nor is it triangle-shaped. The trapezius muscle is a large, flat, superficial muscle that extends longitudinally from the occipital bone to the lower thoracic vertebrae and laterally to the spine of the scapula. It is shaped more like a trapezoid than a triangle, which is where it gets its name. Also, the trapezius muscle's functions include moving the scapulae and supporting the arm. The trapezius muscle does not perform any functions related to the foot. Instead, it supports the trunk of the body and is part of the muscle groups that allow movements such as the rotation and flexion of the neck. For example, while the sternocleidomastoid muscle helps in rotating the head, the trapezius works to stabilize and move the scapulae, which is essential for the proper movement of the shoulder and arm. Therefore, the correct answer is d) Neither a nor b.