Final answer:
Modulation is the process of changing from one key or tonal center to another.
Step-by-step explanation:
The correct answer is B) Modulation. Modulation is the process of changing from one key or tonal center to another. If you change a minor scale to another minor scale, you are essentially changing the tonal center of the music, which is achieved through modulation. For example, if you start with a melody in the key of A minor and then transition to the key of E minor, you have modulated from one minor scale to another.