Final answer:
Gaetano Donizetti's style is characterized by bel canto elements, showcasing beautiful, expressive arias, and dramatic narratives in his operas.
Step-by-step explanation:
One hallmark of Gaetano Donizetti's style is his contribution to the bel canto opera tradition, which emphasizes the beauty of the human voice and virtuosic vocal technique.
Donizetti's operas often showcase melodious and expressive arias, fluid vocal lines, and challenging coloratura passages that allow singers to display their range and agility. His operas also reflect a keen sense of drama and emotion, creating compelling musical narratives.