Answer:
Step-by-step explanation:
the author uses the word trembling, this is a verb. The verb is suggesting an action of movement, trembling is associated with involuntary movement to warm the body. Warming the body is a relaxed feeling and is "normal" body temperature, the idea of trembling suggests it is out of the norms of temperature and therefore gives the idea of vigorous shaking to warm the character up. the fact its involuntary suggests it is out of control, unmanageable and therefore could reflect he persons state of mind