Which of the following is NOT a movement of the human body?

Contraction is a term that describes a process rather than a movement of the body. In the context of muscle physiology, contraction refers to the shortening and thickening of muscle fibers when they receive a signal to generate force. While it is fundamental to how movements are produced, it does not describe a specific movement of the human body in the same way that flexion, elevation, or inversion do.

Flexion refers to decreasing the angle between body parts, such as bending the elbow. Elevation involves moving a body part superiorly, such as lifting the shoulders. Inversion is the movement that involves turning the sole of the foot inward. Each of these terms specifies a distinct action that alters the position of the body or its segments, directly relating to bodily movements, whereas contraction is more associated with muscle function.