Psychology can be defined as the

A-Way to describe events and circumstances
B-Scientific study of the mind
C-Scientific study of mental illnesses
D-Scientific study of behavior and mental processes

D-Scientific study of behavior and mental processes

D-Scientific study of behavior and mental processes

The correct answer is D - Scientific study of behavior and mental processes.

Psychology is the scientific study of behavior and mental processes. It is a branch of science that focuses on understanding how people think, feel, and behave. Psychologists use systematic methods and empirical research to investigate various aspects of human behavior and mental processes.

To arrive at this answer, you can eliminate options A, C, and D:

- Option A, "Way to describe events and circumstances," is not an accurate definition of psychology because it oversimplifies the field. Psychology involves more than just describing events and circumstances; it aims to understand the underlying causes and mechanisms of human behavior.

- Option B, "Scientific study of the mind," is not the most accurate answer because although psychology does study the mind, it also encompasses the study of behavior. The mind is just one aspect of psychology's focus.

- Option C, "Scientific study of mental illnesses," is too narrow and specific. While mental illnesses are a part of psychology, it is not the sole focus. Psychology covers a broad range of human behavior and mental processes, including normal functioning and development.

Hence, it is clear that option D, "Scientific study of behavior and mental processes," is the most comprehensive and accurate definition of psychology.