Fact 1: Echinoderms lack a centralized nervous system.

Fact 2: Starfish and sea urchins are also echinoderms.

Given the two facts above, answer the question "what lack a centralized nervous system?" with the following options: 
- Pesticides
 - neurons
 - barnacles
 - alpacas
 - insects
 - fish
 - humans
 - starfish


 

        starfish 