A voiceover is best described as what?

A voiceover is best described as narration because it involves a voice that is not part of the on-screen dialogue but provides information or commentary about the visual content. This form of audio is often used in documentaries, films, and commercials to give context, explain actions, or convey a character's thoughts without having to show them speaking directly on the screen. The narration enhances the viewer's understanding and emotional engagement with the story.

The other options represent different audio elements that do not serve the same function as a voiceover. On-screen dialogue refers to conversations or interactions between characters that are directly seen and heard, while background music sets the mood or atmosphere but does not narrate or explain the visuals. Sound effects create auditory cues associated with actions or environments but do not provide the narrative element that defines a voiceover.