- Decomposition is when a decomposer breaks down dead organisms
- A decomposer is a kind of living thing
- Therefore, a decomposer is a kind of living thing that breaks down dead organisms

So, a decomposer is a kind of living thing that breaks down dead organisms
What is a decomposer?
- Decomposition is when a decomposer breaks down dead organisms 
- A decomposer is a kind of living thing