Final answer:
Developmental theories address changes in three main domains: physical, cognitive, and psychosocial. These encompass bodily changes, mental processes, and social interactions, reflecting a broad approach to understanding human growth and development.
Step-by-step explanation:
Developmental theories must account for changes in three main domains: physical, cognitive, and psychosocial. These domains encompass the various aspects of human growth, involving bodily changes, mental processes, and social interactions. Physical development looks at body and brain changes, motor skills, and health. Cognitive development includes learning, attention, memory, language, thinking, reasoning, and creativity. Lastly, psychosocial development involves the growth of emotions, personality, and interpersonal relationships. Developmental psychologists consider whether development is continuous or discontinuous, the number of developmental courses, and the influence of nature versus nurture. Theories like those posited by Freud, Erikson, Piaget, and Kohlberg each address these domains and considerations in different ways, reflecting a rich diversity of thought on how humans develop.