The basis of the classification of protozoa is

Options

A. Mode of nutrition
B. Mode of reproduction
C. Mode of locomotion
D. Mode of respiration

Answer

**Step-by-Step Solution:**

1. **Understanding Protozoa**: Protozoa are a diverse group of unicellular organisms that are classified under the kingdom Protista. They are primarily characterized by their ability to move and their mode of nutrition.

2. **Classification Criteria**: The classification of protozoa is based on several criteria, but the most significant one is their mode of locomotion. This means how they move from one place to another.

3. **Identifying Groups**: Protozoa are classified into four main groups based on their locomotory organelles:
- **Mastigophora (Zooflagellates)**: These protozoa use flagella for movement.
- **Sarcodina**: They move using pseudopodia, which are temporary extensions of their cytoplasm.
- **Sporozoa**: These are primarily parasitic and do not have a specific locomotory organelle; they depend on their hosts for movement.
- **Ciliata**: These protozoa use cilia, which are small hair-like structures, for movement and feeding.

4. **Conclusion**: Based on the above classifications, the primary basis for the classification of protozoa is their mode of locomotion. Therefore, the correct answer to the question is option C: mode of locomotion.

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