Why is an earthworm called detritivore?

Explanation

### Step-by-Step Solution:

1. **Definition of Detritivore**: A detritivore is an organism that feeds on dead and decaying organic matter, including plant and animal materials. They play a crucial role in the ecosystem by breaking down this material and recycling nutrients back into the soil.

2. **Classification of Earthworm**: Earthworms belong to the phylum Annelida, which consists of segmented worms. They are classified as invertebrates and exhibit metamerical segmentation, meaning their bodies are divided into repeated segments.

3. **Habitat of Earthworms**: Earthworms are cosmopolitan organisms, meaning they can be found in a variety of habitats all over the world. They thrive in moist environments, which are essential for their survival.

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