Biology is the study of life and therefore biological psychology is the study of human beings. It has three very important aspects that make it unique from other perspectives: it involves the use of a comparative method, understanding human physiology, and how heredity influences our thoughts, moods, and behaviors. Biological psychology is firmly on nature's side in the nature/nurture dispute. See how genes have shaped who we are. He also considers malfunctions of the brain and body as a reason to explain behavior and other psychological aspects. This school of thought is what a psychiatrist would use when prescribing medications for behavioral disorders and/or interventions. Although focused primarily on genes and nature, the biological approach places great emphasis on the Diathesis/Stress model. This model states that people are born with a certain genetic predisposition or disorder and then the environment places or adds stress therefore allowing that disorder or predisposition to emerge and manifest itself. Because of this emphasis on the Diathesis/Stress model, the biological approach must recognize that the environment has a say in how we develop disorders, diseases,