Final answer:
The initial section of a fugue is called the exposition, where the main thematic material is introduced. It sets the foundation for the musical piece, similar to how an exposition in a story sets up the scene and characters.
Step-by-step explanation:
The standard plan of the initial section of a fugue is called the exposition. This is the part where the main thematic material of the fugue is introduced. In the context of a story, the exposition would involve setting the scene, introducing main characters, and hinting at possible conflicts and themes, all of which set the foundation for the unfolding plot. In a musical fugue, the exposition serves to present the primary musical subject and often includes the entry of the voices (such as soprano, alto, tenor, bass in a choral work) in successively, each one presenting the theme or subject in turn. This establishes the musical framework upon which the entire piece will develop.