What is a “coda” in music?

A coda in music refers to a short concluding section that brings a piece to an end. It serves as a wrap-up that often reaffirms thematic material or musical ideas presented earlier in the composition. By providing closure, the coda reinforces the overall structure and intent of the piece. It can vary in length and complexity but usually contrasts with the preceding sections to create a sense of finality.

In the context of the other options, a major theme of the song is more about the primary melody or motif rather than a concluding segment. An introduction to the main melody describes the beginning of a piece rather than its conclusion, while an important improvisational section pertains to parts of a piece where performers take liberties with the music but doesn’t specifically indicate an ending. Therefore, the correct choice accurately defines the role of a coda in musical compositions.