Which term describes a fast tempo in music?

The term that describes a fast tempo in music is "Allegro." In Italian, "Allegro" indicates a lively and brisk pace, generally ranging from about 120 to 168 beats per minute. It can convey a sense of cheerful and energetic character in a piece, making it suitable for upbeat compositions.

In contrast, "Adagio" refers to a slow tempo, typically indicating a leisurely pace. "Andante" suggests a moderate, walking pace, while "Allegretto" denotes a tempo that is faster than "Andante" but not as fast as "Allegro." Thus, "Allegro" is the most appropriate term for describing a fast tempo, distinguishing itself from the other options that indicate slower tempos or moderate speeds.