Biological Evolution

To solve this question, we need to identify who wrote "The Origin of Species."

1. Understanding the Authors:
- Charles Darwin: The correct author of "The Origin of Species," published in 1859, where he proposed the theory of evolution by natural selection.
- Jean-Baptiste Lamarck: Known for his theory of inheritance of acquired characteristics, but did not write "The Origin of Species."
- Charles Lyell: A geologist who contributed to the development of uniformitarianism but did not write "The Origin of Species."
- George Johann Mendel: Known for his work on genetics, but he did not write "The Origin of Species."

2. Identifying the Correct Author:
The author of "The Origin of Species" is Charles Darwin.

Final Answer:
Option (A) Charles Darwin is correct.