Answer:
I go around and in the house but never touches the house
My teeth are sharp my back is straight to cut things up it is my fate.
What can travel around the world while staying in a corner?
I am owned by the poor the rich does not need me. If you eat me you will die!
I am what brings things together. Without me everything you see would be a total mass or debris everywhere. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.