Which one swallows mud

Options

A. Amphioxus
B. Sea Squirt
C. Tongue Worm
D. Asymmetron

Answer

To solve the question "Which one swallows mud?" we need to analyze the options provided: Amphioxus, Sea Squirt, Tongue worm, and Symmetron.

### Step-by-Step Solution:

1. **Understand the Feeding Mechanism of Each Organism**:
- **Amphioxus**: This organism is known to be a filter feeder. It feeds by filtering plankton and small particles from the water, not by swallowing mud.
- **Sea Squirt**: Sea squirts also filter feed on plankton and detritus (dead and decaying organic matter) from the water. They do not swallow mud.
- **Tongue Worm**: Tongue worms are known to be detritus feeders. They consume organic matter, including mud, which makes them the correct answer to the question.
- **Symmetron**: This is another type of lancelet, which is also a filter feeder. Similar to Amphioxus and Sea Squirt, it does not swallow mud.

2. **Identify the Correct Option**:
- After analyzing all the options, we find that the only organism that swallows mud is the **Tongue worm**.

3. **Conclusion**:
- Therefore, the correct answer to the question "Which one swallows mud?" is **Tongue worm**.

### Final Answer:
The correct option is **Tongue worm**.