What is a defining characteristic of the opera genre?

The defining characteristic of the opera genre is the combination of acting, orchestral music, and singing. Opera is a theatrical art form that integrates music, drama, and often dance to tell a story. In an opera, the music is not just an accompaniment; it is essential to the narrative and emotional expression of the characters. The performers engage in both singing and acting, bringing the story and emotions to life through their performances. This synthesis of these elements—music, vocal performance, and stage action—creates a unique experience that distinguishes opera from other musical genres.

While solo instrumental performances may be featured in operas, they are not a defining aspect of the genre itself, which centers around the vocal and dramatic elements. Similarly, while vocal harmonies are crucial in operatic music, they do not encompass the broader scope of what defines an opera. Finally, the reliance on written scores without staging refers more to the nature of music composition rather than the essence of opera, which relies heavily on the interaction between music and performance.