What movement does the frontal plane divide?

The frontal plane, also known as the coronal plane, divides the body into anterior (front) and posterior (back) sections. This anatomical distinction is essential in understanding human movement, as exercises or movements occurring within this plane involve lateral (side-to-side) actions, such as arm raises or side bends.

It's worth noting that the other options refer to different anatomical planes. The left and right division describes the sagittal plane, which separates the body into left and right sides. The superior and inferior distinction pertains to the transverse plane, which divides the body into upper (superior) and lower (inferior) parts. Lastly, the medial and lateral terms are used to describe positions relative to the centerline of the body rather than a specific plane of division. Therefore, the frontal plane's specific characteristic of dividing the body into anterior and posterior sections makes it the correct choice in this context.