What is the area of psychology that focuses on the origin of psychological disorders in biological factors?

Answer: Clinical neuropsychology

Explanation: Clinical neuropsychology is in fact a unified neuroscience and clinical psychology and represents the sub field of psychology. It studies and investigates the origins of psychological disorders in biological factors so that by combining the two branches mentioned, they can provide significant knowledge in assessing, diagnosing and treating certain psychological disorders. Neuroscience and clinical psychology are therefore a blend of theoretical science and practical application and practice in the clinics, thus providing proven, immediate results and practices. In other words, it is an applied science that deals with the relationship and connection between behaviour and the brain. For example, studying and finding some biological damage to the brain that can lead to psychological disorders.