What are the 3 sections of senata allegro form in music?

Sonata allegro form, also known as first movement form, is a musical structure commonly found in the first movements of classical sonatas, symphonies, and concertos. It consists of three main sections:

1. Exposition: The exposition introduces the main themes of the movement. It begins with the presentation of the first theme, usually in the tonic key. This is followed by a transition that modulates to the dominant key, where the second theme is presented. The exposition ends with a closing section that brings back elements of the first theme and establishes the dominant key.

2. Development: The development section is where the composer explores and develops the themes introduced in the exposition. This section is characterized by frequent modulations, contrasting dynamics, and thematic variations. The development builds tension and leads to the recapitulation.

3. Recapitulation: The recapitulation is a restatement of the themes from the exposition, but this time in the tonic key. The first theme is presented again in the tonic, followed by a transition that leads to the second theme, which is also in the tonic. The recapitulation concludes with a coda, which provides a final closure to the movement.