Answer:
The more there is the less you see.
I stay where I am when I go off. What am I?
I help engines spin and pants stay up. What am I?
I come in different colors and shapes. Some parts of me are curvy some are straight. You can put me anywhere you like but there is only one right place for me.
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.
When is it bad luck to see a black cat?