Psychology of education focuses on:

Educational psychology is a specialized field that applies psychological principles to understand and improve teaching and learning processes. Its primary focus is on how individuals learn, develop, and are motivated within educational settings.

• Learning behavior is the correct answer because educational psychology directly investigates cognitive, emotional, and social aspects influencing how students acquire knowledge, skills, and attitudes. It examines theories of learning, instructional methods, and student motivation.
• Teaching policies (A) are more related to educational administration and governance, although psychological research can inform policy decisions.
• Social structure (C) is primarily the domain of sociology, which studies societal organization and institutions, rather than individual learning processes.
• Administration (D) refers to the management and organization of educational institutions, which is distinct from the psychological study of learning itself.