The main function of clitellum is

Options

A. cocoon formation
B. locomotion
C. excretion
D. copulation

Explanation

**Step-by-Step Solution:**

1. **Identify the Structure**: The clitellum is a specific structure found in earthworms and other members of the phylum Annelida.

2. **Understand its Nature**: The clitellum is a thick, glandular, ring-shaped structure located in the epidermis or body wall of the organism.

3. **Recognize its Appearance**: The clitellum typically has light-colored pigments, making it distinguishable on the body of the earthworm.

4. **Determine its Function**: The primary function of the clitellum is related to reproduction. It secretes a viscous fluid that plays a crucial role in the reproductive process.

5. **Cocoon Formation**: This viscous fluid is used to form a cocoon for the eggs of the earthworm, which is essential for the protection and development of the embryos.

6. **Conclusion**: Therefore, the main function of the clitellum is cocoon formation.

**Final Answer**: The main function of the clitellum is cocoon formation.

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