The book systema naturae was written by

Options

A. Linnaeus
B. Haeckel
C. Whittaker
D. Robert Brown

Explanation

**Step-by-Step Solution:**

1. **Identify the Book**: The question asks about the author of the book "Systema Naturae."

2. **Recognize the Author**: The book "Systema Naturae" was written by Carolus Linnaeus, a notable figure in the field of biology.

3. **Understand Linnaeus's Contribution**: Carolus Linnaeus is known for developing the binomial system of nomenclature, which is a method for naming organisms using two Latin names.

4. **Explain the Binomial Nomenclature**: In this system, the first part of the name is the genus (generic name), and the second part is the species (specific epithet).

5. **Conclude the Answer**: Therefore, the correct answer to the question is that "Systema Naturae" was written by Carolus Linnaeus.

**Final Answer**: The book "Systema Naturae" was written by Carolus Linnaeus.

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