Answer:
What is made of wood, but can't be sawed?
By Moon or by Sun, I shall be found. Yet, if there's no light around, I am undone. What am I?
One simple click, one simple flash. A piece of memory, for years I'll last. What am I?
I'm not a bird but I can fly through the sky. I'm not a river but I'm full of water.
I am the kind of dog that chases anything red.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.