Final answer:
Sonata Form had three main sections: the exposition, the development, and the recapitulation.
Step-by-step explanation:
Sonata Form is a musical structure that was standardized by the 19th century. It typically consists of three main sections: the exposition, the development, and the recapitulation. The exposition introduces the main musical themes, while the development section explores and develops these themes further. Finally, the recapitulation restates the main themes and brings the piece to a close.