How did the orchestra change during the time of Mozart and Haydn?

During the time of Mozart and Haydn, the orchestra underwent significant expansion and evolution, both in size and instrumentation. The string section became more prominent, while woodwinds and brass instruments were increasingly included, enhancing the richness of the sound. Additionally, the emergence of the symphonic form and the development of distinct orchestral roles for different instruments marked a shift towards more complex and expressive compositions. This transformation laid the groundwork for the classical symphony and influenced future orchestral music.