teeth chewing food enzymes breaking down food food moving through the intestines food churning in the stomach
I gave my students this multiple choice question: Which example shows a chemical change to food during digestion?

Only one answer is correct among these 4 choices:
- teeth chewing food
- enzymes breaking down food
- food moving through the intestines
- food churning in the stomach

Could you tell me which one is correct?

enzymes breaking down food