Answer:
I am used when you jump off a bridge for fun.
I am a way to say goodbye to your sweetheart
My teeth are sharp my back is straight to cut things up it is my fate.
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
You do not want me when you don’t have me, but when you have me you don’t want to lose me.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic