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: 
- humans
 - dogs
 - our planet
 - insects
 - barnacles
 - starfish
 - birds
 - Pesticides


 

      starfish   