Answer:
Light hides me and darkness kills me. What am I?
I am a small paradise surrounded by dryness and heat.
After you go through a fall, I will take over. All life will stall, or at least grow slower. What am I?
I've been argued on my color. Without me you'll die. So many attempts on your life use me so make sure you have many of my White friends.
What two keys cannot open any door?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.