Answer:
What is used by man, tossed by trees, everywhere but unseen?
It comes from crystal and melts to a treat. Add it to your tea to make it sweet. What is it?
What freezes after it is heated up?
A standard dimension for sandwiches and rulers
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair
How did the farmer find his wife?