Answer:
It's what light turns into in the night
I'm the son of water but when I return to water I die. Who am I?
You'll have to consult an optometrist if you want to improve this.
What kind of cup doesn't hold water?
What occurs four times in every week, twice in every month, only once in a year but never in a day?
I touch the Earth, I touch the sky, but if I touch you, you’ll likely die. What am I?