What ccurs when many muscles contract a little bit all at once?\nOptions:\n- (A) heat production\n- (B) heat loss\n- (C) sweating\n- (D) permineralization\n- (E) hypothermia\n- (F) resistance\n- (G) cramping\n- (H) heat energy Let's solve this problem gradually.

User
Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production occurs when many muscles contract a little bit all at once. So the final answer is (A).
Assistant