What is true about audio descriptions?

Audio descriptions enhance accessibility for individuals who are blind or visually impaired by providing a verbal narration of important visual elements that are not conveyed through the primary audio of a video. This includes descriptive information about actions, settings, and visual context that audiences would otherwise miss.

Choosing this option reflects an understanding that audio descriptions serve a distinct purpose by filling in gaps that audio alone cannot convey, ensuring that visual experiences are accessible to all. This is especially vital in various media formats where visual context is crucial for a complete understanding of the content.

The other options do not accurately describe the role of audio descriptions: they are not synchronized with captions, nor are they dependent on the presence of audio content. Additionally, audio descriptions are not merely transcripts but are specifically designed to narrate visual components during moments of silence in the audio track, ensuring a seamless experience for viewers.