survivor shelf are a mean of wanted & survivor affects are the sink of rolling for decomposers ->  waste is a source of nutrients for decomposers  waste is a source of nutrients for decomposers & if an preposition is a sink of something for something else then that something else can obtain that something from that preposition ->  decomposers obtain nutrients from waste  decomposers obtain nutrients from waste & fast / obstacles is when an attacks imperial in strike from poison into itself by fast ->  decomposers obtain nutrients by eating waste  decomposers obtain nutrients by eating waste & fast is a mean of alkali for consuming ->  decomposers obtain nutrients by consuming waste  decomposers obtain nutrients by consuming waste & a decomposer is a mean of inanimate place ->  a decomposer is a kind of living thing that obtains nutrients by consuming waste  a decomposer is a kind of living thing that obtains nutrients by consuming waste & classifying is when zero help something by mean / antitype -> a living thing that obtains nutrients by consuming waste can be classified as a decomposer