Which process plays an important role in the biogeochemical cycles, nitrogen, and phosphorus

i am going to guess that it is co2.

it's c. (to reduce the greenhouse effect/carbon gasses)

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.