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
Think hard. Detailed solution:
(B)
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.

.

So, the final answer is (B)