The study of the brain is called neurology. The brain is divided into three parts and these are forebrain, midbrain, and hindbrain.
The correct answer is option D that is Sleep
According to the question, Sleep is not a cognitive process because you can not control sleep. It is an automatic process and you will sleep when your body is tired.
Hence, the correct answer is option B.
For more information about cognitive process, refer to the link:-
https://brainly.com/question/10577996