Answer:
What type of house weighs the least?
I row quickly with four oars but never comes out from under my own roof.
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
They took me from my mother's side where I was bravely bred and when to age I did become they did cut off my head. They gave to me some diet drink that often made me mad but it made peace between two kings and made two lovers glad.
The 8 of us go forth and back to protect our king from a foes attack
No matter how little or how much you use me, you change me every month.