The document discusses human behavior and psychology. It defines human behavior as the range of behaviors influenced by culture, attitudes, emotions, and other factors. Psychology is defined as the scientific study of the mind and behavior. The document notes that studying human behavior at the BBA level helps one understand how to interact with people, deal with different behaviors, and sustain human life. It outlines the main subfields of psychology like biopsychology, developmental psychology, health psychology, and social psychology. Finally, it discusses topics like sensation and perception, the visual and gustatory systems, and principles of perceptual organization.