Answer:
I am bought by the yard but worn by the foot
The more you have me, the less you see. Shine a light on me and I flee. What am I?
I have roots nobody sees. I am taller than trees. Up, up I go but I never grow. What am I?
When I point up itβs bright. When I point down itβs dark.
Drop me and the world will shatter. You can always find me where you empty your bladder.
Give it food and it will live, give it water and it will die.