An episode is a. the beginning of a sonata. b. a scene from an opera. c. a key change. d. a section of a rondo.

The answer is Option D.

Explanation:

A rondo shape generally involves exchanging the abstain which is the primary movement with one or more episodes (differentiating topics). The scenes, likewise called "deviations" or "couplets" is regularly in a different key from the fundamental key. A rondo is a kind of amusement, like ward off, that is utilized as a preparation penetrate in affiliation football. Rondos happen in nearness, with the having bunch frequently hovered around the restricting gathering.

i'm not too sure - if you could attach the picture