Wow this seems like a cool class. Ikr though I’m sorry
In my opinion, the correct answer is <span>D. stated and restated in different forms. A theme isn't of lesser importance - on the contrary, it often forms the melodic spine of a work, e.g. a sonata or a symphony. It may recur many times throughout the work, in many different forms, with a changed tonality, another key, extended or shortened versions... </span>
The use of chromatic tones. example: in c-major, C# Db D# Eb F# Gb G# AB A# and Bb.
They aren’t. Simplest answer.