Which type of arrangement of setae is found in earthworm ?

Explanation

### Step-by-Step Solution:

1. **Identify the Organism**: The question asks about the arrangement of setae in earthworms. Earthworms belong to the phylum Annelida and are known for their segmented bodies.

2. **Understand the Function of Setae**: Setae are small bristle-like structures found on the body of earthworms. They play a crucial role in locomotion, helping the earthworm to anchor itself to the soil and move effectively.

3. **Location of Setae**: Setae are present in every segment of the earthworm's body. This segmentation is a key characteristic of annelids.

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