Answer:
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I am the kind of soda you must not drink. What am I?
you need thousands of me to create a digital image.
After you go through a fall, I will take over. All life will stall, or at least grow slower. What am I?
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?