Answer:
Echinoderms use it's tube feet for feeding, movement and respiration.
Step-by-step explanation:
Echinoderms are group of phylum of Marine animals that are triploblastic and they include star fishes, sea cucumbers, sea urchins e.t.c.
Echinoderms have tube feet's. The tube feets are outer projections on the oral parts of the body. They are part of the vascular system and are arranged in grooves along the arms. They operate through hydraulic pressure and are use for feeding ( passing food orally) , respiration and loccomotion.