Answer:
The shorter I am, the bigger I am. What am I?
In spring, I am gay in handsome array. In summer, more clothing I wear. When colder it grows, I fling off my clothes. In winter, quite naked appear. What am I?
Face with a tree skin like the sea. A great beast I am. Yet vermin frightens me.
I spend most of my day eating white. When I am quick enough I get rewarded with fruit and something blue. In a dark room with blue walls I run from the ghosts that roam the halls
I am the beginning of the end and the end of time and space. I am essential to creation and I surround every place.
No matter how little or how much you use me, you change me every month.