What can you conclude about fossil by looking at the layers of rock?

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

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.