Phosphorus is required for organisms to synthesize DNA and phospholipids. In an ecosystem, phosphorus is transferred into the soil by the weathering of rocks. Phosphorus is absorbed by plants, which are consumed by herbivores. Carnivores obtain phosphorus through the consumption of herbivores. Which is a process that transfers phosphorus between an abiotic system and a biotic system? A. an herbivore consuming a plant
B. a carnivore consuming an herbivore
C. a plant absorbing phosphorus from the soil
D. weathering of rocks releases phosphorus into the soil
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from my research i have to the conclusion that decomposers, such as fungi, bacteria and invertebrates, play a critical role in nutrient cycling and without them the earth's ecosystem may not support life as we know it. elements such as carbon, nitrogen and phosphorus exist in limited amounts on earth, although huge amounts of carbon are being released into the atmosphere from underground sources now by humans. it is still extremely important that other nutrients be retained by the process of re-use. decomposers are organisms that are able to chemically break down dead material and make these elements available for use by other organisms. without this breakdown of dead material, dead bodies would pile up. so decomposers also play a role in clean up also. without them, life might not continue as we know it and dead material would overwhelm the earth.    

ya the other dude is right