 
 <translate> What was the question for this implicit rationale, and corresponding answer?
Shivering occurs when many muscles contract a little bit all at once. Heat production is increased by shivering and non-shivering thermogenesis . Heat production is increased when many muscles contract a little bit, all at once.
 The answer: (B) <ibo> Gịnị bụ ajụjụ maka echiche a na-apụtachaghị ìhè, na azịza kwekọrọ na ya? Ịma jijiji na-eme mgbe ọtụtụ akwara na-ama jijiji n'otu mgbe. A na-amụba mmepụta okpomọkụ site na thermogenesis na-ama jijiji na nke na-anaghị ama jijiji. A na-amụba okpomọkụ a na-emepụta mgbe ọtụtụ akwara na-agbakọta ntakịrị, nile n'otu mgbe.  Azịza ya bụ: (B) 