Answer:
who do you think you know but sometimes you don't
Through its wounds, water does run. It once held many but now has none. What is it?
If I have it, I don't share it. If I share it, I don't have it. What is it?
What is pronounced like one letter, written with three letters. And belongs to all animals?
I tremble at each breath of air, and yet can heaviest burdens bear.
What is so fragile that saying its name breaks it?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?