Answer:
What is used by man, tossed by trees, everywhere but unseen?
What can be white and yellow at the same time?
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.
A standard dimension for sandwiches and rulers
What has 4 fingers and a thumb, but is not living?
Often cooked as fillet, this meat comes from an animal that swims underwater.