The esophagus is a tube in which food is pushed from the mouth to the stomach. As the food is pushed through the esophagus, it becomes more compact. This is — A.
a chemical change, only.

B.
a physical change, only.

C.
both a chemical and a physical change.

D.
neither a chemical nor physical change.

not too sure but maybe in the hot springs.

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.