Explanation:
B
Tube feet are a characteristic of the phylum Echinodermata.
- They are a characteristic organ of the star fishes.
- They are a part of the water vascular system, which is a hydraulic system in echinoderms necessary for locomotion, food ingestion, adhesion and gas exchange. - They are marine animals with spiny skin.
- They have an exoskeleton of the calcareous plates from which the spine arises.