Which sections define the classic sonata form?

• A. Exposition, development, recapitulation
• B. Theme, variation, coda
• C. Prelude, fuga, rondeau
• D. Allegro, adagio, presto

Answer: (A)

Classic sonata form is built around three primary sections that shape the overall movement: exposition, development, and recapitulation. In the exposition, the main musical ideas or themes are presented, usually with contrasts in key (one in the home key and another in a closely related key), and often with a bridge that leads from one theme group to the next. The development takes those themes and fragments, recombines them, and explores various keys, creating tension and propulsion as harmony moves away from the home key. Finally, the recapitulation brings back the original themes and, crucially, returns them to the home key, giving a sense of closure and unity. Sometimes a coda follows to reinforce the ending.

This structure is what defines the classic form heard in many first movements of Classical-era works. The other options describe different types of forms or elements: a theme-variation-coda pattern belongs to variation form; prelude, fuga, rondeau are associated with Baroque styles; and focusing on tempo markings like allegro, adagio, presto refers to speeds rather than formal sections.