Answer:
A. MP3
Step-by-step explanation:
ZIP file extensions are used to compress a file. This is used in the case of files that are too large and are needed to be compressed and to be extracted for later use.
MP4 file extensions are used to indicate that the file is a video. MP4 is just one of the many video file extensions.
PNG which stands for Portable Network Graphics, is used when saving pictures or images. I save my Photoshop and Canva designs in PNG because they seem more realistic in that file format.
It cannot be any of the other options as I have explained their use above. Besides, MP3 file extensions are used in saving music or audio files.