Hello!
A scavenger is an organism such as a vulture that will eat dead organisms but will not return it into the ecosystem the same way fungi and bacteria do. Usually they would not eat bones and feathers as they do not contain any nutrients for the scavenger. Therefore, B would not be our answers.
A scavenger does not eat fungus. They will eat dead organisms, therefore C and D would not be our answers.
Dead plant matter is a dead organism. It most likely would still contain nutrients if it's energy had been returned into the ecosystem via decomposers. Therefore, our answer is A) dead plant matter.
I hope this helps!
