Composition!

This photo revolves around center, which is the focal object. The red leaf is centered in the photo, giving the photo radial symmetry.

This photo has the subject, Nannette, on the far left side of picture, following the rule of thirds.

Finally, this is a photo I took at Disneyland. The castle is the center and subject of the photo, and can be categorized as radial symmetry. It also follows the rule of thirds.