Who conquered the Roman Empire? a. barbarians
b.pagans
c. Ottoman Turks
d. Egyptians

A. Please mark me brainliest

Soil is the main abiotic reservoir for elements involved in local biogeochemical cycles, such as calcium and phosphorus. nutrient elements return to the abiotic reservoir via death, excretion, wastes. elements that are moving through the biotic or abiotic factors may be recycled, or they may be accumulated in a reservoir where they are held for a long period of time.