A response to what occurs when many muscles contract a little at once?\nOptions:\n- (A) heat\n- (B) cold\n- (C) sweat\n- (D) pain\n- (E) forces\n- (F) stress\n- (G) comfort\n- (H) motion
Step-by-step reasoning:
(B)
Shivering occurs when many muscles contract a little bit all at once.

Another response to cold is shivering.

A response to cold occurs when many muscles contract a little at once.

.

Final answer: (B)