Based on the information given, the author choose the title "Three Brains in One" because C There are three main parts of the brain.
<h3>What are the parts of the brain?</h3>
It should be noted that there are three main parts of the brain. They're the cerebrum, brainstem, and the cerebellum.
The cerebrum relates to vision, touch, hearing, etc. The brainstem enables movement, coordination, etc. The cerebellum helps on supplying blood flow to the brain.
Learn more about the brain on:
brainly.com/question/124675
