Please help i don’t understand

where in your body is there an enzyme that does function at a high or low ph? what is the name of that enzyme and its function?

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.