Answer :
The classical composers vary the standard structure of the symphony in many ways, one of which is modifying the standard structure of the symphony from the original allegro to a slow movement symphony.
The classical composers varied the standard structure of the symphony further by creating the modified Minuet and Finale.
The standard structure of symphony is defined as Allegro, which is characterized as a fast sonata form.
The varied types include a slow movement of Allegro, followed by a Minuet characterized by three beats in a bar.
The Finale is characterized by energetic Allegro molto.
Hence, in this case, it is concluded that the classical composers varied the standard structure of the symphony in many ways.
Learn more here: https://brainly.com/question/3716691