In your own words, explain why you think that geologists find relative dating useful.

Fossils are important for working out the relative ages of sedimentary rocks. Fossils can help to match rocks of the same age, even when you find those rocks a long way apart. This matching process is called correlation, which has been an important process in constructing geological timescales. Relative dating is also used to arrange geological events, and the rocks they leave behind, in a sequence.

the oceanic zone is typically defined as the area of the ocean lying beyond the continental shelf, but operationally is often referred to as beginning where the water depths drop to below 100 meters (328 feet), seaward from the coast to the open ocean.

explanation:

it would be c. xylem.