What are the three major parts of psychology?

The three major parts of psychology are clinical psychology, which focuses on diagnosing and treating mental health disorders; cognitive psychology, which studies mental processes such as perception, memory, and problem-solving; and developmental psychology, which examines the psychological growth and changes that occur throughout a person's lifespan. Each area contributes to a comprehensive understanding of human behavior and mental processes. Together, they address various aspects of individuals’ thoughts, emotions, and behaviors.