Final answer:
The slowest tempo indication among allegro, allegretto, vivace, and presto is allegretto, which is slightly slower than allegro but faster than moderate tempos.
Step-by-step explanation:
Among the tempo indications allegro, allegretto, vivace, and presto, the slowest is allegretto. Tempo indications are used in music to describe the speed at which a piece should be played. Allegro is fast, lively, and brisk, vivace is faster, often lively and spirited, presto is very fast, and allegretto is slightly slower than allegro but faster than moderate tempos.
Tempo indications are used in music to describe the speed at which a piece should be played. The term presto indicates a very fast tempo, whereas vivace indicates a lively and fast tempo. Allegro is a faster tempo than allegretto, but slower than vivace and presto.