decomposition is when a decomposer recycles / returns nutrients / nitrogen from dead organisms to the soil by eating those dead organisms & decomposition is when a decomposer breaks down dead organisms ->  a decomposer returns nutrients to the soil by breaking down those dead organisms  a plant is a kind of organism & a tree is a kind of plant ->  a tree is a kind of organism  a tree is a kind of organism & if a tree falls then that tree is dead ->  a fallen tree is a kind of dead organism  a fallen tree is a kind of dead organism & a tree contains wood ->  wood is a part of a dead organism  a decomposer returns nutrients to the soil by breaking down those dead organisms & wood is a part of a dead organism ->  a decomposer returnes nutrients to the soil by breaking down wood  a decomposer returnes nutrients to the soil by breaking down wood & when something is returned to a place that something is released to that place -> when a decomposer breaks down wood, nutrients are relseased