You are presented with the question "What raises metabolism?" and the following answer choices: 
- cigarettes
 - Chlorophyll
 - Chemical energy
 - aerobic capacity
 - fossil fuels
 - Fully cooking the oysters
 - smoking cigarettes
 - excess body weight

Now knowing that mammals generate heat mainly by keeping their metabolic rate high and excess body weight raises metabolic heat production, choose the best answer.


 

        excess body weight 