Answer:
What body part is pronounced as one letter but written with three, only two different letters are used?
If you blow past your destination, you'll have to throw your car into this.
Low on cash? Pick out items from this rack.
What is used by man, tossed by trees, everywhere but unseen?
Without what would everyone lose their head?
In birth I spring forth, in life I unfold. In death I wilt and die, but rebirth restores all.