Question to you: Echinoderms are resistant to some:
Options:
- (A) starfish
- (B) enzymes
- (C) Toxicity
- (D) pesticide
- (E) parasites
- (F) toxins
- (G) boats
- (H) chemicals.
Let's reason step-by-step:
Echinoderms lack a centralized nervous system. From animal experiments, it seems to be a central nervous system toxin. Echinoderms are resistant to some toxins. Final answer: (F).