Answer
Classical music was influenced by Scarlatti's innovative use of keyboard techniques and his exploration of harmonic and melodic possibilities. His sonatas, characterized by their virtuosic passages, clear textures, and contrasting sections, laid the groundwork for the development of the classical sonata form. Scarlatti's influence can be seen in the works of later composers such as Haydn, Mozart, and Beethoven, who adopted and expanded upon his ideas.