Answer:
My seas have no water, my mountains have no rock, and my land has no grass. What am I?
You use me between your head and your toes the more I work the thinner I grow.
I am bought by the yard but worn by the foot
I am an instrument capable of making numerous sounds but cannot be touched or seen. What am I?
The warmer I am the fresher I am.
Brings the sky a lot closer.