Fact 1: Adult echinoderms have radial symmetry.

Fact 2: Echinoderms are represented by the starfish.

Given the two facts above, answer the question "Adult starfish have what?" with the following options: 
- a cuticle
 - plankton
 - whales
 - sensory neurons
 - layers of fat
 - radial symmetry
 - kinetic energy
 - adults


 

      radial symmetry   