Answer:
What can you catch but not throw?
I am the kind of nut that is empty at the center and has no shell.
I am useless when together but useful when I am broken apart. What am I?
I am easy to waste and unstoppable
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.