Final answer:
To play MP3 audio files on a desktop or laptop, a media player is required. It is the software that handles playback of multimedia content, including MP3 and other audio formats.
Step-by-step explanation:
We need a media player to play certain types of audio files, like MP3, on a desktop or laptop. The correct answer is a) Media player. A media player is software that allows you to play multimedia content including audio files, videos, and music tracks. It can handle various digital audio formats, and the MP3 format is a standard for audio compression that makes files smaller while keeping high audio quality.
Audio converters are used to change audio file formats, a sound card is an expansion card or integrated circuit that provides input and output of audio signals, and an audio editor is a program used to edit audio files.