Peculiar water driven tube system is the unique feature of the following group:

Options

A. Echinodermata
B. Arthropoda
C. Annelida
D. Platyhelminthes

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which group has a peculiar water-driven tube system. This indicates that we need to identify the group that possesses this unique feature.

2. **Identifying the Groups**: The groups mentioned in the context are Echinoderms, Arthropods, Annelids, and Platyhelminthes. We need to analyze each group to see if they have a water-driven tube system.

3. **Analyzing Echinoderms**: Echinoderms, such as starfish, are known for their water vascular system. This system is crucial for their locomotion and feeding. It consists of a network of water-filled canals that help in movement and manipulation of their tube feet.

4. **Analyzing Arthropods**: Arthropods, which include insects and crustaceans, have an exoskeleton made of chitin. They do not possess a water-driven tube system; instead, they have other mechanisms for movement and protection.

5. **Analyzing Annelids**: Annelids, or segmented worms, have a segmented body structure that aids in locomotion. They do not have a water vascular system like echinoderms.

6. **Analyzing Platyhelminthes**: Platyhelminthes, or flatworms, are primarily parasitic and do not require a water vascular system. They have a simple body structure and rely on diffusion for nutrient absorption.

7. **Conclusion**: Based on the analysis, the group that possesses a peculiar water-driven tube system is Echinoderms. Therefore, the correct answer is Echinodermata.

**Final Answer**: Echinodermata (e.g., starfish).

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