You are presented with the question "What lacks a centralized nervous system?" and the following answer choices: 
- starfish
 - barnacles
 - blowfish
 - our planet
 - humans
 - Pesticides
 - insects
 - sharks

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


 

 starfish        