What is the primary purpose of voice overs in video production?

Voice overs play a crucial role in video production, primarily serving the purpose of narrating or providing commentary over footage. This technique allows creators to convey information, tell a story, or add context to visual elements on screen, improving viewer engagement and comprehension. By combining descriptive narration with visual storytelling, voice overs can guide the audience through the content, emphasize key points, and convey emotions that might not be represented through visuals alone.

In contrast, the other options illustrate different audio elements in video production. Background music sets the mood, enhances emotional impact, and supports the overall tone but does not provide the informative commentary that voice overs do. Enhancing environmental sounds can provide a sense of place and realism but does not add the narrative or commentary aspect essential for storytelling. Capturing live sound is critical for authenticity in dialogue and ambiance but does not serve the same purpose as voice overs, which are pre-recorded and meant to enhance or complement the provided footage.