Answer:
It's a game played by serious people that takes place on a global scale.
I know a word of letters three. Add two, and fewer there will be!
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 goes in, but never through? I've got some and so do you. We might lend one, or even two, but only if our trust is true.
If Teresa’s daughter is my daughter’s mother, who am I to Teresa?
What never gets any wetter no matter how hard it rains?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?