You are presented with the question "Adult starfish have what?" and the following answer choices: 
- a cuticle
 - plankton
 - whales
 - sensory neurons
 - layers of fat
 - radial symmetry
 - kinetic energy
 - adults

Now knowing that adult echinoderms have radial symmetry and echinoderms are represented by the starfish, choose the best answer.


 

      radial symmetry   