Consider the question. What kind of animals has a water vascular system with tubed feet?
Options:
- (A) animals
- (B) starfish
- (C) reeds
- (D) insects
- (E) warm-blooded
- (F) sponges
- (G) sea coral
- (H) four limbs
 If the answer is '(B)'; explain the reasoning:
Echinoderms have a unique water vascular system with tube feet. Echinoderms are represented by the starfish. Starfish have a unique water vascular system with tube feet.