Answer:
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
In a tunnel of darkness lies a beast of iron. I can only attack when pulled back. What am I?
Lighter than what I am made of. More of me is hidden than seen. What am I?
A thousand wheels but move I do not. Call me what I am call me a lot.
Many people own a copy of me. Without me the world would fall.
I'm a soft, sweet food made from a mixture of flour, shortening, eggs, sugar, and other ingredients, baked and often decorated.