Which is immobile?\nOptions:\n- (A) adult starfish\n- (B) all matter\n- (C) adult goldfish\n- (D) gastropod shells\n- (E) tadpoles\n- (F) adult sponges\n- (G) an object\n- (H) an organism's body
Hmmm, let me think. I don't want to be wrong, so I got to be careful.
User
Adult sponges are sessile. Sessile Attached permanently, immobile. Adult sponges are immobile. The answer: (F).
Assistant