Enzymes yes the question is literally enzymes

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's anything that aren't producers and consumers.

explanation:

you've got to be clear on what "this" is

when it is at an intermediate population density