Q: How do mammals generate heat?


Read this paragraph and choose the correct option from the provided answers:

Mammals generate heat mainly by maintaining a high rate of metabolism. Compared with the cells of other animals, the cells of mammals have more mitochondria. Mitochondria are the cell organelles that generate energy. Mammals may also produce little bursts of heat by shivering. Shivering occurs when many muscles all contract slightly at the same time. The muscle contractions generate a small amount of heat.

 Choices:

- running around fast

- eating spicy foods

- maintaning low metabolism

- maintaining high metabolism


A:
maintaining high metabolism