What does setting a keyframe in an audio clip allow you to do?

Setting a keyframe in an audio clip allows you to adjust audio volume over time, which is essential for creating dynamic audio mixes. By placing keyframes on the audio timeline at specific points, you can define the volume level at those points, enabling smooth transitions between different audio levels. This means you can fade audio in and out, create crescendos, or adjust the volume to match the intensity of a scene. It gives you precise control over how audio responds throughout your project, enhancing the overall sound design and helping to ensure that dialogue, music, and sound effects blend harmonously as the video plays.

Other options relate to broader functionalities in Premiere, such as adding effects or controlling video properties, but keyframes specifically deal with gradual changes in audio parameters like volume levels.