You are presented with the question "What kind of animal doesn't have a centralized nervous system?" and the following answer choices: 
- dog
 - mammals
 - cows
 - bird
 - human
 - elephants
 - starfish
 - a fish

Now knowing that echinoderms lack a centralized nervous system and echinoderms are represented by the starfish, choose the best answer.


 

       starfish  