Which of the following describes the frontal plane?

The frontal plane, also known as the coronal plane, is defined as the plane that separates the body into dorsal (back) and ventral (front) parts. This means that it runs vertically from side to side, allowing for a division that distinguishes the front of the body from the back. This anatomical plane is crucial in many medical and anatomical contexts as it helps to visualize how structures are positioned in relation to one another from a front-back perspective.

The other options describe different anatomical planes. For instance, the division into left and right halves pertains to the sagittal plane, which runs vertically but perpendicular to the frontal plane. The separation of the body into upper and lower sections relates to the transverse (or horizontal) plane, which divides the body into sections above and below. Lastly, the symmetrical axes is not a standard definition of any specific plane; instead, it may refer to concepts of symmetry in anatomy rather than a specific anatomical plane like the frontal.