Final answer:
Beethoven developed and expanded various classical genres during the Romantic era, including symphonies, concertos, sonatas, and operas.
Step-by-step explanation:
Beethoven developed and expanded various classical genres during the Romantic era.
He continued to write symphonies, concertos, sonatas, and operas, which were all popular with classical composers. His compositions, especially his later works, showcased both classical and romantic influences.