What is a composition consisting of recurring theme alternating contrasting sections in music?

A rondo is a musical composition that consists of a recurring theme alternating with contrasting sections. The theme is usually presented in the beginning and is repeated several times throughout the piece, while the contrasting sections provide variation and contrast. Rondos are often used in classical music, such as sonatas and concertos, and can be found in the works of composers such as Mozart, Beethoven, and Schubert.