Answer:
What is often returned but is never borrowed?
I can be written, I can be spoken, I can be exposed, I can be broken.
All about, but cannot be seen, Can be captured, cannot be held, No throat, but can be heard. Who am I?
It holds most knowledge that has ever been said. But is not the brain, is not the head. To feathers and their masters, it's both bane and boonΒ One empty, and one full.
Do you know what you can hold without ever touching it?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?