Which of the following describes a body part moving forward?

Protraction is the term that describes a body part moving forward, typically in a horizontal plane. This movement often occurs in the context of the shoulder blades (scapulae), which can be protracted when an individual reaches forward. Protraction is significant in various movements, especially in activities requiring the arms to extend or stretch forward.

The other terms refer to different types of movements: retraction describes the backward movement of a body part, opposing protraction; supination refers to the outward rotation of the forearm, positioning the palm facing up; and adduction refers to the movement of a limb or body part toward the midline of the body. Each of these movements plays a distinct role in describing human anatomy and biomechanics, but protraction specifically highlights the forward motion described in this context.