What distinguishes opera from other musical forms?

Opera is distinguished from other musical forms primarily because it combines singing, acting, and orchestration to tell a story. This multimedia approach involves not only vocal performances by singers but also dramatic elements and orchestral accompaniment, all working together to create a rich narrative experience.

In opera, the music is integral to the storytelling; each aria and ensemble number is crafted to enhance the emotional depth and progression of the plot. The interaction between the singers' performances and the orchestral music is crucial, providing a dynamic atmosphere that connects the audience with the characters and their journeys. This synthesis of various artistic elements is what sets opera apart from other forms of musical expression, which may focus on either instrumental or vocal elements without the dramatic component.

Other options such as performing without singing, focusing solely on instrumental music, or being confined to concert hall settings do not capture the comprehensive nature of opera as an art form. Operas are inherently vocal and incorporate many aspects of theater, making them unique within the broader spectrum of musical genres.