Which type of body organisation is found in the coelenterates?

Explanation

### Step-by-Step Solution:

1. **Understanding Coelenterates**: Coelenterates, also known as Cnidarians, are a group of animals that include jellyfish, corals, and sea anemones.

2. **Body Organization Levels**: In biology, body organization can be classified into different levels: cellular, tissue, organ, and organ system.

3. **Primitive Body Structure**: Coelenterates exhibit a primitive body structure. This means their organization is not as complex as higher animals.

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