Answer:
How many letters are there in the English alphabet?
I have cities without people forests without trees and oceans without water. What am I?
I am as hard as metal, yet as flimsy as glass. I shine like a star, yet I am only a rock. What am I?
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
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?
Before I grow I'm small. When I'm old I grow tall. When I die I give a mighty fall.