A clear sign that a subduction zone occurs in the ocean is the existence of a . *

Is Folded mountain 100% sure

b is the correct answer

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.