Final answer:
The four A) psychological domains crucial for understanding human scientific study are physical development, cognitive development, and psychosocial development.
Step-by-step explanation:
The question asks about the four psychological domains that are considered when studying individuals scientifically. These domains are vital to understanding structures, processes, development, and therapeutic change in a person.
Developmental psychologists categorize human development into three main domains: physical, cognitive, and psychosocial development. Physical development pertains to the body and brain changes, sensory functions, motor skills, and overall health and wellness.
Cognitive development includes learning, attention, memory, language, thinking, reasoning, and creativity. Lastly, psychosocial development deals with emotions, personality, and social relationships. Understanding these domains is crucial for studying how humans change from conception through the lifespan.