Which of the following is an example of a frontal movement?

Frontal movements occur in the frontal plane, which divides the body into anterior (front) and posterior (back) sections. These movements involve actions that allow for side-to-side motion. Shoulder abduction is a clear example of a frontal movement because it involves the arms moving away from the body’s midline in a lateral direction. This contrasts with motions like hip and knee flexion, which occur primarily in the sagittal plane, involving forward and backward movements. Shoulder hyperextension also occurs in the sagittal plane as it involves extending the arm backward past the neutral position. Thus, shoulder abduction distinctly represents a movement in the frontal plane, affirming that it is the correct response.