Opera is a form of musical theater that combines music, drama, and visual elements. It typically includes a combination of singing, acting, and orchestral music, often with elaborate sets and costumes. Opera can cover a wide range of genres and styles, from classic operas like those by Mozart or Verdi to modern works that push the boundaries of traditional opera. Themes in opera often revolve around love, betrayal, power, and human emotions. Opera is typically performed in opera houses or theaters, with professional singers and musicians.