Final answer:
A musical form with a theme that repeats over and over is a Rondo. Unlike a Sonata, Fugue, or Minuet, the Rondo's main theme returns multiple times, often in a pattern such as ABACADA.
Step-by-step explanation:
The musical form that features a tuneful theme that repeats over and over is known as a Rondo. In a Rondo, the main theme, typically tuneful and catchy, alternates with contrasting sections, returning repeatedly throughout the piece. This form was popular during the Classical period, and a typical rondo pattern might look like ABACADA, where 'A' indicates the recurring theme and 'B', 'C', and 'D' are contrasting episodes.
In contrast to a Rondo, a Sonata typically comprises several movements that include exposition, development, and recapitulation, rather than a repeating theme. A Fugue is a contrapuntal composition where a theme or subject is introduced by one voice and is then imitated by other voices in succession. A Minuet, on the other hand, is a dance form in triple meter that was often part of a larger work, such as a symphony or a string quartet, but does not have a recurring theme as its main feature.