What genre of classical music is synthetic? why?

Opera can be called the most synthetic genre in classical music, since it is in this musical and theatrical genre that several types of arts are synthesized – music, literature, theater, choreography.

Among them, music, consisting of many vocal, sometimes dance numbers with symphonic accompaniment, and individual symphonic numbers, plays a leading role.

The literary basis is performed by the libretto with the presentation of the plot of the work.

Theatrical action consists of acts with short or long intervals. The opera is framed by an introduction in the form of an overture and a conclusion as an epilogue, performed by a symphony orchestra.