Answer:
I'm white and used for cutting and grinding. When I'm damaged, humans usually remove or fill me. For most animals I am a useful tool. What am I?
My head bobs lazily in the sun. You think I'm cute for my face is yellow my hair is white and my body is green.
Weight in my belly, trees on my back, nails in my ribs, feet I do lack. What am I?
I mirror your actions.
I look at you you look at me I raise my right you raise your left.
In your fire you hear me scream! Creaking and whining yet I am dead before you lay me in your hearth.