Answer:
I am a mountain at night, meadow at day. What am I?
I plow and plow but never sow.
I am quick when Iām thin. I am slow when Iām fat. Wind is my worst nightmare.
I destroy your home from the inside out.
I am always hungry I must always be fed. The finger I lick will soon turn red.
No matter how little or how much you use me, you change me every month.