Answer:
I am pronounced as one letter written with three. I come in blue black brown or grey. Reverse me and I read the same either way.
I am an instrument that you can hear but cannot see or touch. What am I?
I am always around you but often forgotten. I am pure and clean most time but occasionally rotten.
I start with an E end with an E and have a letter in me.
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?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?