You are presented with the question "Mammals generate heat mainly by what?" and the following answer choices: 
- hugging mammals
 - calorie counting
 - with their fur
 - energy of moving objects
 - burning calories
 - sweating
 - selling fur coats
 - flow of electrons

Now knowing that mammals generate heat mainly by keeping their metabolic rate high and and resting metabolic rate is a big contributor to calories burning, choose the best answer.


 

     burning calories    