Spheres of study are areas of knowledge that are studied and researched. They can range from the sciences to the humanities, and include fields such as mathematics, history, philosophy, and literature. Each sphere of study has its own set of theories, methods, and approaches to understanding the world. The term 'spheres of study' is often used to refer to the various disciplines within a particular field of study. For example, in the field of psychology, there are many different spheres of study, such as cognitive psychology, developmental psychology, and social psychology.