The answer is - your little brother whines whenever he wants something.
Psychology is the scientific study of the mind and behavior.
Psychologists are actively involved in studying and understanding mental processes, brain functions, and behavior. A psychological research can be defined as a type of research that is typically conducted by psychologists for the systematic study, evaluation, and analysis of the thought, feelings, emotion, behaviors, and experiences of various individuals or groups of people. There are different types of psychology, such as
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