Answer:
<h2>6th and 7th</h2>
Explanation:
Remember, in melodic minor scales, the 6th and 7th degrees are raised ONLY when ascending; however, when descending, the scale is played only with the accidentals mentioned in the scale's key signature.
Imitation
I believe! It's called a round by definition however.
Answer:
One reason is technological advancments. Another reason may be becuase people were becoming more abstract in the ways they made music.