Question

Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smaller molecules.

Answer 1

Question? I mean a free fact is ok but why tho

Answer 2

A) The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.