Q: Fact 1: Shivering occurs when many muscles contract a little bit all at once. Fact 2: Heat production is increased by shivering and non-shivering thermogenesis . Given the two facts above, what happens when many muscles contract a little bit all at once?

pick from the following.
(i). heat is produced;
(ii). To keep their body heat.;
(iii). biceps;
(iv). sweating;
(v). digestion;
(vi). rapid expansion;
(vii). preventing heat transfer;
(viii). death;
A:
(i).