Final answer:
The coda in movement 2 of Eine Kleine Nachtmusik is based off of Section A, returning to earlier themes for a sense of closure.
Step-by-step explanation:
The coda in movement 2 of Wolfgang Amadeus Mozart’s Eine Kleine Nachtmusik is typically based off of Section A of the movement. In the classical sonata-allegro form, which Mozart often utilized, a coda is used to conclude a movement and is usually developed from earlier themes presented.
In this case, the coda would bring back elements from Section A, providing a sense of familiarity and closure to the movement.