Darwin has published a book titled ________.

Hint: Charles Darwin was an English naturalist that is famous for his contribution to the theory of evolution. He introduced us to the concepts of natural selection and how evolution works.

Complete answer:
The book named "On the Origin of Species" is written by Charles Darwin which gave the foundation of evolutionary biology by introducing the scientific theory that populations evolved over the course of generations through the process of natural selection. It also presented evidence for the theory that diversity of life arose by common descent through a branching pattern of evolution.

Additional Information: Charles Robert Darwin was a naturalist from Shrewsbury, Shropshire, and is known for his work on the theory of evolution. He proposed the theory of natural selection which is popularly known as "survival of the fittest". He suggested that the way living things are today changed over time through natural selection and made them fit their Environment which he called adaptation.
His famous book named "On the origin of species" supported these concepts by providing a great deal of evidence that evolution has taken place and proposed an explanation of how evolution works. But on the negative side, the connection between natural selection and inheritance that Darwin tried to express through this book was unclear because the process of genetic inheritance being unknown at that time. However, this book came out to be a big step in the history of science despite the objection of religion.

Note: Besides On the Origin of Species, he wrote several other books on science. Some examples are Journal and remarks, The structure and distribution of coral reefs, Geological observations of volcanic islands, geological observations on South America, The descent of man, The expression of Emotions in Man and Animals, etc.