Final answer:
In his middle period of writing music, Beethoven incorporated elements of the Romantic era while still maintaining some of the fundamental characteristics of the Classical period. He expanded the structures and forms of his compositions and emphasized emotional expression and dramatic intensity in his music.
Step-by-step explanation:
In his middle period of writing music, Beethoven incorporated elements of the Romantic era while still maintaining some of the fundamental characteristics of the Classical period. During this time, Beethoven expanded the structures and forms of his compositions, creating longer and more complex works.
He also emphasized emotional expression and dramatic intensity in his music, often using dynamic contrasts and bold harmonies to convey heightened emotions.
Beethoven's middle period is often referred to as his heroic period, as it was during this time that he composed symphonies such as the Third Symphony, also known as the Eroica, and the Fifth Symphony, both of which showcase his innovative and dramatic approach to music.