Answer:
What language does a billboard speak?
I produce wool and spit a lot
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
I am the minerals vital for your good health.
you cannot keep me until you have given me
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.