Answer:
I have a foot but no leg. What am I?
If you've got me I'm everywhere. If you share me I'm nowhere. What am I?
You can see me in water, but I never get wet. What am I?
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
My full powers come when my makers are dead. I await a heavy hat to put on my head. What am I?
Give it food and it will live, give it water and it will die.