Echinoderms lack a centralized nervous system.
Starfish and sea urchins are also echinoderms.
Sea urchins lack a centralized nervous system.
What lacks a centralized nervous system?
Options:
[a] Damaged hearing
[b] Pesticides
[c] Cats
[d] insects
[e] Sea urchins
[f] barnacles
[g] Humans
[h] Fish