What phylum do starfish belong to?\nOptions:\n- (A) fertile\n- (B) animals\n- (C) Echinoderm.\n- (D) Mollusca.\n- (E) Sponge.\n- (F) Absorb light\n- (G) Annelid.\n- (H) a fish OK. Let's think hard:
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Echinoderms have a unique water vascular system with tube feet. Each starfish arm is lined with tube feet. Starfish are echinoderms.
So, the final answer is (C).
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