One of the themes
is change is not always a good thing because the from the beginning of the story, the girls are being told to change into civilized human beings and forget all of their tradition and natural wolf instincts. They are being told to change who they are.
Contain the writers feelings
I think that the correct answer would be :
C.) Its spare grayness sets up a desolate mood
I hope that this helps you !
If you do begin, it rhymes because they both end in in.