Question

vertical planes include all but... the frontal plane. the sagittal plane. the transverse plane.

Explanation:

Vertical planes are oriented vertically (up - down) relative to the body. The frontal (coronal) plane divides the body into anterior and posterior, and the sagittal plane divides it into left and right; both are vertical. The transverse (horizontal) plane divides the body into superior and inferior, which is horizontal, not vertical. So the transverse plane is not a vertical plane.

Answer:

the transverse plane.