Question to you: What lacks respiratory and excretory systems?\nOptions:\n- (A) the Sun\n- (B) insects\n- (C) starfish\n- (D) barnacles\n- (E) ferns\n- (F) water\n- (G) Conifers\n- (H) humans.
Let's reason step-by-step:
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Echinoderms lack respiratory and excretory systems. Echinoderms are represented by the starfish. Starfish lack respiratory and excretory systems. Final answer: (C).
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