What is the relationship between the notes in a melodic minor scale when descending?

In a melodic minor scale, the ascending form typically features the sixth and seventh scale degrees raised by a half step compared to the natural minor scale. This alteration gives the scale a unique sound, often perceived as more ascending and brighter. However, when descending, the melodic minor scale reverts to the notes of the natural minor scale, which means that the sixth and seventh scale degrees are lowered back to their natural minor positions. This creates a different harmonic context and "flatter" sound compared to the ascending version.

This relationship highlights the distinction of the melodic minor scale, which is characterized by its dual form—ascending and descending. Thus, the correct answer identifies that while ascending the scale, the sixth and seventh degrees are raised, they are altered to their natural (lowered) form when descending.