Why is an earthworm called detritivore?

Explanation

### Step-by-Step Solution:

1. **Definition of Detritivore**:
- A detritivore is an organism that feeds on detritus, which consists of decomposing organic matter, including dead plants and animals.

2. **Role of Earthworms**:
- Earthworms are classified as detritivores because they consume detritus. They play a crucial role in the ecosystem by breaking down this organic matter.

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