Answer:
Haydn helped to establish the four movements of the symphony.
Step-by-step explanation:
The most important sections of Haydn's instrumental music are symphonies and quartets. The first symphonies, which did not survive in the repertoire, date from the 1760s. They are used in them elements of Baroque music, combining, in small orchestras, wind instruments and strings. As for the structure, Haydn soon adopted the division into four movements: allegro, andante, minuet and second allegro.