Which opera is composed by Mozart?

Don Giovanni is indeed one of the operas composed by Wolfgang Amadeus Mozart, and it stands as a significant work in the opera repertoire. Premiering in 1787, it combines elements of both comedy and tragedy, reflecting Mozart's ability to blend these genres effectively. The story explores themes of seduction, morality, and the supernatural, showcasing Mozart's exceptional talent for character development and his innovative use of musical motifs to represent ideas and emotions throughout the opera.

The context of Don Giovanni in the classical music landscape is critical; it is celebrated for its rich orchestration, intricate vocal lines, and the dramatic depth of its characters. Often performed in conjunction with other Mozart operas, such as The Magic Flute, Don Giovanni remains a cornerstone of opera studies and performances today, demonstrating Mozart's influence on the art form.

The other choices listed represent notable works from different composers or styles. The Mikado, for instance, is a comic opera by Gilbert and Sullivan, while Tristan und Isolde is a landmark opera by Richard Wagner that embodies the transition to Romanticism in music.