Giardia is

Options

A. Ectoparasite
B. Intracellular parasite
C. Tissue parasite
D. Coelozoic parasite.

Answer

**Step-by-Step Solution:**

1. **Identify Giardia**: Begin by understanding what Giardia is. It is a flagellated protozoan that acts as a parasite in humans, causing a disease known as Giardiasis.

2. **Understand its Habitat**: Giardia primarily resides in the small intestine of its host. This is crucial to determining its classification as a parasite.

3. **Determine the Type of Parasite**:
- **Ectoparasite**: This type of parasite lives on the outside of the host. Since Giardia lives inside the host's small intestine, this option is incorrect.
- **Intracellular Parasite**: This type of parasite lives within the cells of the host. Giardia does not live inside individual cells but rather in the intestinal lumen, so this option is also incorrect.
- **Tissue Parasite**: This type of parasite invades and lives within the tissues of the host. Giardia does not invade tissues but lives in the hollow organ of the small intestine, making this option incorrect as well.
- **Silozoic Parasite**: This term refers to parasites that live in a body cavity. Since Giardia lives in the small intestine (which can be considered a body cavity), this option is correct.

4. **Conclusion**: Based on the analysis of the options, the correct classification for Giardia is that it is a Silozoic Parasite.

**Final Answer**: Giardia is a Silozoic Parasite.

---