Final answer:
The commonality between industrial & organizational psychology, health psychology, exercise psychology, forensic psychology, and clinical psychology is their focus on studying human behavior in their respective domains, using psychological principles either in applied or research settings.
Step-by-step explanation:
The fields of industrial & organizational psychology, health psychology, exercise psychology, forensic psychology, and clinical psychology all study human behavior, but they each focus on different applications of psychological principles. Industrial and organizational psychology is divided into three broad areas: industrial psychology, which includes hiring and evaluating employees, organizational psychology, focusing on employee relationships and organizational culture, and human factors psychology, concerned with the design of tools that optimize productivity, safety, and health. These subfields are part of the broader domain of psychology and contribute uniquely to our understanding of human behavior in various contexts through applied and research-oriented activities.