Answer:
I am heavy forward, but backward I'm not. What am I?
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?
You bind me and I walk. You loosen me and I stop. What am I?
Sometimes I annoy you, sometimes you can't live without me. But no matter how hard you try, you can't destroy me. What am I?
I was not born but I am here. I have no name but I am given many. I was made by science and life
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?