What helps to insulate and protect the body?\nOptions:\n- (A) tail fins\n- (B) Animal fur\n- (C) fur seals\n- (D) keratin\n- (E) nitrogen\n- (F) snow\n- (G) Epidermis\n- (H) poultry Think carefully first, then make a decision. My thoughts:
User
Hair helps to insulate and protect the body. Hair is composed of the protein keratin. The protein keratin helps to insulate and protect the body. So the answer is (D).
Assistant