Answer:
Sitting down you have it, Standing up you don't.
What cannot talk but will always reply when spoken to?
Sometimes you feel it weigh a ton. Yet it is nothing, but somehow still there. Makes you uncomfortable around anyone, But speak its name and it's gone.
The more you take away, the bigger it gets.
I always run but never walk, I sometimes sing but cannot talk, No head on which a hat to place, You always look me in the face.
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?