if an ecosystem does not contain a high amount of biodiversity, predators may eat too many keystone species. this will lead to...

the correct answer is c   with the systems

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.