Geographic Earth materials modified over time by physical, chemical, and biological processes that serve many functions are considered . A)
equatorial parent materials
B)
modified soil horizons
C)
modified atmospheric materials
D)
nurtured dominant structures

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:

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

d. planting trees

the trees take in carbon to make oxygen.