Answer:
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
I cost no money to use, or conscious effort to take part of. And as far as you can see, there is nothing to me. But without me, you are dead.
What grows in winter, dies in summer, and grows roots upward?
I am the greatest teacher out of them all, but alas in the end I kill my pupils.
Through its wounds, water does run. It once held many but now has none. What is it?
What language does a billboard speak?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?