Enzymes like pepsin are found in the stomach and act on food to break it down into simpler substances. This is an example of a — chemical change. stimulus. physical change. reflex.

Chemical Change

Explanation:

Enzymes like pepsin are found in the stomach and act on food to break it down into simpler substances. This is an example of a —

Chemical change

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.