The answer to this question would be <span>Some is used by decomposers, and some is released into the environment as heat.
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When an organism died, decomposer can degrade some of its remaining corpses and use the produced energy. Some of the parts can't be degraded like bones.
The total energy should not be decreased as it was opposing the law of conservation of energy.
230 is your anwser! sorry bad english
Natrual variations i think
I believe it is D, the reason being is because they form on their own, not from a living or dead organism. It can't be B because that is true, and the same for C. hope this helps, have an amazing day :)