Which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during cold months a cooperation and hibernation b aggression and circadian rhythm c circadian rhythm and hibernation d courtship and cooperation

i thinking 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.