Question

organism that breaks down dead or decaying organisms ex. fungi and bacteria
consumer
decomposer
producer
scavenger

Explanation:

Decomposers are organisms that break down dead or decaying organisms, recycling nutrients back into the ecosystem. Fungi and bacteria are common examples. Consumers obtain energy by eating other organisms, producers make their own food through photosynthesis, and scavengers eat dead animals but do not break them down at a microscopic - level like decomposers.

Answer:

B. Decomposer