Answer:
In a tunnel of darkness lies a beast or iron. It can only attack when pulled back. What is it?
What starts with the letter “t”, is filled with “t” and ends in “t”?
The more you take away from me, the bigger I shall get. What am I?
I have a gown but I'm not a priest; I have a crown but I'm not a king.
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. Sooner or later everybody needs my help yet many people are afraid to let me help them.
What is lighter than what it is made of?