Q: Dilation occurs when part of a cell that a what does not have relaxes.\nOptions:\n- (A) breathing\n- (B) organ\n- (C) the eyes\n- (D) abrasion\n- (E) complex\n- (F) animal\n- (G) nerves\n- (H) retina
Let's think step by step below.

User
Dilation occurs when cell walls relax. Animals have no cell walls. Dilation occurs when part of a cell that an animal does not have relaxes.
Thus, the answer is (F).
Assistant