Hirudinaria shows locomotion by

Options

A. Looping
B. Swimming
C. Both A and B
D. Creeping

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to Hirudinaria, which is commonly known as a leech. It belongs to the phylum Annelida.

2. **Understand the Habitat**: Hirudinaria primarily inhabits freshwater environments. This is important as it influences their locomotion methods.

3. **Describe the Body Structure**: Leeches have a segmented body that is adapted for various forms of movement. They possess anterior and posterior suckers that aid in locomotion.

4. **Types of Locomotion**:
- **Looping Movement**: Hirudinaria exhibits a looping movement. This is achieved by the contraction and lengthening of segments of their body, utilizing the anterior and posterior suckers to anchor and propel themselves forward.
- **Swimming Movement**: In addition to looping, Hirudinaria can swim gracefully in water. This swimming motion is facilitated by the movement of their head and the waving of their body.

5. **Evaluate the Options**:
- **Looping**: Correct, as they do exhibit this type of movement.
- **Swimming**: Correct, as they can swim in water.
- **Both A and B**: Correct, since they can perform both looping and swimming.
- **Creeping**: Incorrect, as leeches do not exhibit creeping locomotion.

6. **Conclusion**: The correct answer is "both A and B," indicating that Hirudinaria shows locomotion by both looping and swimming.