Answer:
One simple click, one simple flash. A piece of memory, for years I'll last. What am I?
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
I cannot be felt, seen or touched. Yet I can be found in everybody. My existence is always in debate, yet I have my own style of music. What am I?
A dragon's tooth in a mortal's hand, I kill, I maim, I divide the land.
Cloud is my mother. Wind is my father. I come down but never go up. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.