What is the most important classification difference between radio drama and stage drama?

Radio drama depends more on auditory medium and stage drama on visual performance

The governing concept is classification according to the dominant medium through which a dramatic work reaches its audience. Radio drama relies chiefly on spoken language, voice acting, music, sound effects, silence, and the listener’s imagination because the performers and setting are not seen. Stage drama combines dialogue and acting with visible performers, costumes, gestures, scenery, lighting, and movement in a shared performance space. Thus option B is correct. Option A is false because radio drama can have a complete narrative; option C denies the central role of acting on stage; and option D ignores the important auditory-versus-visual difference. Both are drama, but their primary modes of communication differ.

This is a Class 9 Art Education question. Chapter: Introduction to Art. Topic: Types of art.