You are presented with the question "what lack a centralized nervous system?" and the following answer choices: 
- barnacles
 - amphibians
 - insects
 - primates
 - alpacas
 - Pesticides
 - starfish
 - snakes

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


 

       starfish  