Answer:
I am an instrument capable of making numerous sound but cannot be touched or seen.
Sometimes dark and sometimes bright, I make my way among twinkling lights. Seas and oceans obey my call, yet mountains I cannot move at all. What am I?
I keep things green and keep kids happy during summer time.
Tear me off and scratch my head what once red is now black.
The dirtier I get, the whiter I am. What am I?
The answer I give is yes, but what I mean is no. What was the question?