Answer:
Health psychology
Explanation:
Health psychology is a specific area that focused on different areas such as biology, psychology, and sociology. These factors influence the mental illness and health of a person.
The other field such as behavioral medicine and medical psychology both areas work in health psychology. In psychology both health and illness affected by may factors.
But on the other hand, health and hereditary contagious are the common terms used in mental illness. Many of the behavioral and psychological factors that affect the mental illness of a person.
Thus health psychology is the different sub-field of the psychology that affects the psychological factors that contribute to health, illness and the recovery of a person.