Answer:
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
who do you think you know but sometimes you don't
Thirty white horses on a red hill, first they champ, then they stamp, then they stand still.
It's like food but water kills it. What is it?
What goes around and around the wood, but never goes into the wood?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.