Fact 1: Echinoderms lack a centralized nervous system.

Fact 2: Echinoderms are represented by the starfish.

Given the two facts above, answer the question "What lacks a centralized nervous system?" with the following options: 
- starfish
 - barnacles
 - blowfish
 - our planet
 - humans
 - Pesticides
 - insects
 - sharks


 

 starfish        