What Am I Riddles

Question: People pick me, and watch me until they give me power. Then they don't stare in my eyes. What am I?

Question: I am pain, I am fear, I will take what you hold dear, Nations shudder when I'm near, Many die when I'm here. What am I?

Question: This old one runs forever, but never moves at all. He has no lungs, nor a throat, But you can hear his mighty roaring call.

Question: I run over fields and woods all day. Under the bed at night I sit not alone. My tongue hangs out, up and to the rear, awaiting to be filled in the morning.

What am I?

Question: I am shorter when I stand and taller when I sit.
Sometimes I'm even called a pit.

What am I?