The branch of psychology that studies the relationship between biological processes and behavior, including the brain and nervous system, is known as:

The branch of psychology that studies the relationship between biological processes and behavior, particularly focusing on the brain and nervous system, is known as biopsychology or neuroscience. This field examines how various biological factors, including genetics, neurochemistry, and the structure and function of the nervous system, influence human behavior and mental processes. Biopsychologists utilize a variety of methods, including brain imaging techniques and animal models, to understand how the brain affects thoughts, emotions, and actions. By integrating the study of biology and psychology, this discipline provides insights into how biological underpinnings contribute to psychological phenomena, facilitating a better understanding of mental health, neurological disorders, and cognitive function.