Final answer:
The excerpts present scenes from literature featuring a piano which enhances the narrative by creating atmosphere and adding emotional depth.
Step-by-step explanation:
The texts provided are excerpts from various works of literature where piano playing is a significant element. In the context of these lines, they reveal scenes in which characters interact with the piano or with each other while the piano is being played, creating an atmosphere or adding tension to the narrative.
For instance, one excerpt from a play shows Nora asking Helmer to play the piano for her as she dances, while another describes an old musician providing entertainment at a social gathering.
The piano serves as both a literal instrument and a symbolic element, enhancing the storytelling by setting a mood or underscoring emotional beats within the narrative.