Question

{"given":"A list of four organisms: cockroach, starfish, cuttlefish, and catfish.","key_observation":"Tube feet are small, flexible, hollow appendages used for movement, respiration, or collecting food. They are a unique and characteristic feature of the phylum Echinodermata.","formula_steps":[],"option_analysis":[{"label":"(A)","text":"Cockroach","verdict":"incorrect","explanation":"Cockroaches belong to the phylum Arthropoda and use jointed appendages (legs) for their locomotion."},{"label":"(B)","text":"Starfish","verdict":"correct","explanation":"Starfish belong to the phylum Echinodermata. They possess a water vascular system with external tube feet that help in locomotion and capturing food."},{"label":"(C)","text":"Cuttlefish","verdict":"incorrect","explanation":"Cuttlefish belong to the phylum Mollusca and use tentacles and a siphon (jet propulsion) for their movement."},{"label":"(D)","text":"Catfish","verdict":"incorrect","explanation":"Catfish belong to the phylum Chordata (class Osteichthyes) and use muscular tails and fins for swimming."}],"answer":"(B)"}