Answer:
The more you work the more I'll eat.You keep me full I'll keep you neat.
If a plane crashes on the border of US and Canada where do they bury the survivors?
I am a king who's good at measuring stuff.
David's father has three sons: Snap Crackle and ?
Poor people have it. Rich people need it. If you eat it you die. What is it?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.