Fact 1: Cooking food requires adding heat energy. Fact 2: Many of foods that humans eat are cooked, recooked, and then warmed up. Given the two facts above, what do humans add to their food?

Select from:
A). nutrients.
B). Proteins.
C). Greenhouse gases.
D). pain.
E). gasoline.
F). Heat energy.
G). Energy..
H). coal.
The answer is:
F).