Answer:
Wind and cord combine, buzzing in the box. In all this we find, though to some the use is lost. What am I?
I am the kind of nut that is empty at the center and has no shell.
My first is in fish but no in snail. My second is in rabbit but not in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
You will always find me in the past. I can be created in the present, but the future can never taint me. What am I?
What can you break even if you never touch it?
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.