Answer:
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
I can only be played on a windy day
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
I am a certain five-letter word and become shorter when you add two letters to me. What am I?
I tremble at each breath of air and yet can heaviest burdens bear.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?