A sonata became a great innovation of the classical period, the parts of of a Sonata include
three main sections:
1. Exposition - This is where the main themes of the piece are introduced. Typically, there are two contrasting themes presented in different keys.
2. Development - In this section, the themes from the exposition are explored and developed further. This often involves variations on the themes, modulation to different keys, and other exploratory techniques.
3. Recapitulation - In the final section, the main themes are restated in their original keys, bringing the piece to a satisfying conclusion. Sometimes there is also a coda, a concluding section that ties everything together.