Which movement in a classical symphony typically features a fast tempo with sonata allegro form?

The first movement of a classical symphony typically features a fast tempo and is structured using the sonata-allegro form. This form is characterized by three main sections: exposition, development, and recapitulation. The exposition introduces two contrasting themes, the development manipulates these themes through various keys and variations, and the recapitulation returns to the primary themes in the home key, providing resolution.

This structure allows for dynamic contrasts and thematic development, which energizes the opening of the symphony. Fast tempos in this movement provide excitement and a sense of vigor, effectively setting the tone for the entire work. In contrast, other movements in a classical symphony, such as the second, often feature slower tempos and different forms, while the third movement traditionally adopts a lighter, often dance-like character, and the fourth movement usually resolves the symphonic journey, sometimes still employing elements of sonata form but often in a celebratory or concluding manner.