Answer:
What is never used unless it's in a tight place?
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
I'm tall in the morning and short in the noon. I disappear at night but I will be back soon.
What asks but never answers?
Iām grown from darkness but shine with a pale light. Very round I am and always a lady's delight.