Respiration in earthworm occurs by

Options

A. Lungs
B. Blood vessels
C. Body surfaces
D. Typhlosole

Explanation

### Step-by-Step Solution:

1. **Identify the Organism**:
- The question asks about respiration in earthworms, which belong to the phylum Annelida.

2. **Understand the Options**:
- The options provided are lungs, blood vessels, body surface, and typhlozome.

3. **Evaluate Typhlozome**:
- Typhlozome is a structure in the intestine of the earthworm that aids in absorption, not respiration. Therefore, it is not a correct option.

4. **Evaluate Lungs**:
- Earthworms do not possess lungs. They rely on other means for respiration. Thus, this option is also incorrect.

5. **Evaluate Blood Vessels**:
- Blood vessels in earthworms are primarily involved in the circulation of blood and nutrients. While they play a role in transporting gases, they do not directly facilitate respiration. Hence, this option is not correct.

6. **Evaluate Body Surface**:
- Earthworms respire through their body surface, which is covered by a moist layer. This process is known as cutaneous respiration. The thin skin allows for gas exchange through diffusion.

7. **Explain Cutaneous Respiration**:
- In cutaneous respiration, oxygen diffuses through the moist skin into the body of the earthworm, where it is then transported by the blood vessels. This method is effective due to the high vascularity of their skin.

8. **Conclusion**:
- Therefore, the correct answer to the question is that respiration in earthworms occurs by the body surface, specifically through cutaneous respiration.