Answer:
What measures out time until in time all is smashed to it?
My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
What can be underwater, under fire, on fire and taking water all at the same time?
I have five letters and people eat me. When you remove my first letter I become a crime. Remove my first two letters and I am an animal. If you remove my first and last letters I'm a form of music
You use it between your head and your toes, the more it works the thinner it grows.