What does Adobe Premiere Pro do when you add new clips to a sequence?

When new clips are added to a sequence in Adobe Premiere Pro, the software conforms the clips to match the sequence settings. This process ensures that the clips are compatible with the sequence's frame rate, resolution, and other settings. By conforming the clips, Premiere Pro helps maintain consistent playback quality and ensures that all media fits seamlessly within the established project parameters. This is crucial for achieving a professional and polished end result, as it allows for smooth editing and compatibility with the sequence timeline.

The other options do not accurately represent the behavior of Adobe Premiere Pro when adding clips. For instance, deleting existing clips is not a standard action when new clips are introduced to a sequence; the software allows multiple clips to coexist. Enhancing audio quality might occur through other processes or effects but is not an automatic function of adding new clips to a sequence. Similarly, splitting clips into smaller segments does not happen automatically and would require specific commands or edits from the user. Thus, the correct action when new clips are added is to conform them to the sequence settings.