Answer:
What goes through towns and over hills but never moves?
I will go within you and destroy you. Only because you wanted me too
I have roots that no one sees and I am taller than trees. Up, up I go, but never do I grow. What am I?
When you buy me I am costly, but the only use I have is hanging only. What am I?
I am used to bat with, yet I never get a hit. I am near a ball, yet never thrown. What am I?
No matter how little or how much you use me, you change me every month.