Compare and contrast the work done by paleontologists and biologists

ANSWER AND EXPLANATION:

SIMILARITY: Both paleontologist and biologists carries out studies or experiments on organisms that were once alive.

DIFFERENCE: The paleontologist mainly studies fossils (i.e the remains of ancient organisms that once lived) to deduce various information about them (such their age, ancestral background and etc). Whereas Biologists are scientists whom studies is specifically on living organisms.

doctors i believe if i'm wrong sorry

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."