What has a water vascular system with tube feet?\nOptions:\n- (A) humans\n- (B) blastoids\n- (C) bushes\n- (D) orchids\n- (E) Most plants\n- (F) ferns\n- (G) bacteria\n- (H) the Sun
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
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Echinoderms have a unique water vascular system with tube feet. Echinoderms in the diorama include the crinoids and blastoids. Blastoids have a unique water vascular system with tube feet. The answer: (B).
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