Final answer:
The music of Handel inspired Joseph Haydn to write an oratorio, after Haydn experienced Handel's works in London.
Step-by-step explanation:
The music of composer Handel inspired Joseph Haydn to write an oratorio. Haydn was profoundly affected by Handel's work, especially after attending Handel's oratorios during his visits to London. This experience led him to compose his own well-known oratorios, "The Creation" and "The Seasons." While Haydn was influenced by many composers of his time, it was Handel's successful blend of dramatic narrative and music within the oratorio form that specifically prompted Haydn's contributions to the genre.