Fact 1: Adult echinoderms have radial symmetry. Fact 2: Echinoderms are represented by the starfish. Given the two facts above, adult starfish have what?

Possible answers:
(I) a cuticle
(II) plankton
(III) whales
(IV) sensory neurons
(V) layers of fat
(VI) radial symmetry
(VII) kinetic energy
(VIII) adults
The answer is:
(VI)