Given the question: Fact 1: Mammals generate heat mainly by keeping their metabolic rate high. Fact 2: Excess body weight raises metabolic heat production. Given the two facts above, answer the question "What raises metabolism?" with the following options: - cigarettes - Chlorophyll - Chemical energy - aerobic capacity - fossil fuels - Fully cooking the oysters - smoking cigarettes - excess body weight
The answer is:
excess body weight