Choices:
1). burning.
2). burying.
3). degrading.
4). hydration.
5). boiling.
6). Light.
7). sharing.
8). cooking.
Given those answer options, answer the question: Fact 1: Cooking food requires adding heat energy. Fact 2: Heat is essentially the source of energy. Given the two facts above, doing what to food requires adding the source of energy?
A:
8).