Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: Which of these are broken down during chemical, but not physical, changes?
compounds
Carbohydrates, proteins, and lipids during digestion are broken down during chemical changes. However, the question asks for answers