Answer:
The more you take, the more you leave behind. What are they?
I am a mountain at night meadow at day
My head bobs lazily in the sun. You think I'm cute for my face is yellow my hair is white and my body is green.
Use me if you really want to see inside someone
What can one catch that is not thrown?
No matter how little or how much you use me, you change me every month.