(iv)
How does a central bank keep prices stable?

As it is responsible for price stability, the central bank must regulate the level of inflation by controlling money supplies by means of monetary policy. Open market operations are the key means by which a central bank controls inflation, money supply, and prices.

the answer is counterpoint.

counterpoint definition: "the art or technique of playing a melody or melodies in conjunction with another, according to fixed rules."

counterpoint is present in a lot of baroque music- such as bach (notably his wtc prelude and fugues) and scarlatti, but can also be found in music by mozart, beethoven. it can even be found in music as modern as john williams!