The name Hydra was given by

Options

A. Ellis
B. Aristotle
C. Linnaeus
D. Reaumur.

Answer

To answer the question "The name Hydra was given by," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the scientist who named the organism "Hydra."

2. **Identifying Hydra's Classification**: Hydra belongs to the kingdom Cnidaria, which is important for understanding its biological classification.

3. **Understanding Binomial Nomenclature**: The naming system used in biology is known as binomial nomenclature, which assigns two names to each organism: a generic name and a specific epithet.

4. **Identifying the Generic Name**: In this case, "Hydra" is the generic name of the organism.

5. **Identifying the Scientist**: The question provides multiple-choice options: Ellis, Aristotle, Linnaeus, and Driemeier.

6. **Determining the Correct Answer**: The generic name "Hydra" was given by the scientist Carl Linnaeus, who is known for formalizing the system of naming organisms.

7. **Final Answer**: Therefore, the name Hydra was given by Linnaeus.

### Final Answer:
The name Hydra was given by Carl Linnaeus.

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