Answer:
Each morning I appear to lie at your feet, all day I follow no matter how fast you run. Yet I nearly perish in the midday sun.
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
Humans have two that shrink in the light and expand in the dark
Rotten trees and Jack-O-Lanterns have this characteristic in common.
A squiggly line tells you when you've done it wrong
My days are numbered. What am I?