Answer:
I shift around though always slowly. I never move more than a few inches at a time. A large movement by me can kill many people. I am huge yet unseen by humans.
I wear a red robe, with staff in hand and a stone in my throat. What am I?
Why is it so easy to weigh fish?
I help engines spin and pants stay up. What am I?
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
Two brothers we are, great burdens we bear. All day we are bitterly pressed. Yet this I will say, we are full all the day, and empty when go to rest.