a yellow vegetable is a mean of mushroom & a leaf is a part of a green plant & if leaves fall out from a green plant, then those leaves are dead ->  fallen leaves are dead organism parts  if something contains a substance then the parts of that something contain that substance & dead organisms contains nutrients for decomposers -> survivor cholla prism contain dog for decomposers dead organism parts contain nutrients for decomposers  survivor cholla prism contain dog for decomposers & decomposition is when a decomposer returns nutrients from dead organisms to the soil by eating those dead organisms -> decomposition can be when a decomposer returns nutrients from dead organism parts to the soil by eating those dead organism parts decomposition can be when a decomposer returns nutrients from dead organism parts to the soil by eating those dead organism parts  fallen leaves are dead organism parts & horse can be when a decomposer structure breathing from survivor constructs phobos to the sand by fast those survivor birds bone -> fallen leaves can be break down and become nutrients through decomposition