Answer:
It increases and decreases yet no one see it. It is not a fire and yet it can be quenched.
Why to you never bring a Pokemon into the bathroom with you?
Who cleans the ocean?
Mr. Blue lives in the blue house, mr. Pink lives in the pink house, and mr. Brown lives in the brown house. Who lives in the white house?
What do you call a calculator that works instantly?
What never gets any wetter no matter how hard it rains?