Final Answer:
The description that applies to the second exposition of the first movement of a classical concerto is b) Restatement of the main theme.
Step-by-step explanation:
Exposition in a Concerto: In the first movement of a classical concerto, the exposition typically introduces the main themes. The second exposition is a repetition of these themes.
Restatement of the Main Theme: The second exposition is characterized by the soloist restating or elaborating on the main themes introduced by the orchestra in the first exposition. This allows the soloist to showcase their interpretation and virtuosity.
Development of Themes: Following the second exposition, the concerto moves into the development section, where the themes are explored and varied before the eventual return to the original material.
Understanding the structure of a concerto movement enhances appreciation for classical music compositions.
Thus the correct option is B