Q: What does head hair prevent the loss of?\nOptions:\n- (A) matter\n- (B) chemicals\n- (C) energy\n- (D) sunlight\n- (E) Nutrients\n- (F) warmth\n- (G) humidity\n- (H) sweating
Let's think step by step below.

User
Head hair is especially important in preventing heat loss from the body. Basically, heat is energy. Head hair is especially important in preventing energy loss from the body.
Thus, the answer is (C).
Assistant