Answer:
I have three feet but I cannot walk. What am I?
Always in you, sometimes on you. If I surround you, I can kill you. What am I?
Find me on body builders or in the drink aisle.
I am quick when I'm thin. I am slow when I'm fat. Wind is my worst nightmare. What am I?
I soar without wings I see without eyes. I've traveled the universe to and fro. I've conquered the world yet I've never been anywhere but home.
Give it food and it will live, give it water and it will die.