a fish is a kind of organism & scavengers eat dead organisms ->  some scavengers eat dead fish  a scavenger is a kind of organism & if an organism eats something then that something is a source of frood to that organism ->  if a scavenger eats something then that something is a source of food to that scavenger  some scavengers eat dead fish & if a scavenger eats something then that something is a source of food to that scavenger ->  dead fish are a source of food for some scavengers  if something causes a living thing to be dead then that something increases the amount of those living things that are dead & if a living thing dies then that living thing is dead ->  living things dying increases the amount of those living things that are dead  an animal is a kind of living thing & a fish is a kind of animal ->  a fish is a kind of living thing  living things dying increases the amount of those living things that are dead & a fish is a kind of living thing ->  fish dying increases the amount of fish that are dead  dead fish are a source of food for some scavengers & fish dying increases the amount of fish that are dead ->  fish dying increases the amount of food for scavengers  fish dying increases the amount of food for scavengers & if the amount of something increases then there will be more of that something -> if fish die then there will be more food for scavengers