The pronoun whose refers to:
Read the following passage from Passing, by Nella Larsen, and answer the question.
Stepping out of the elevator that had brought her to the roof, she was led to a table just in front of a long window whose gently moving curtains suggested a cool breeze. It was, she thought, like being wafted upward on a magic carpet to another world, pleasant, quiet, and strangely remote from the sizzling one that she had left below.
LARSEN, Nella. Passing. In: The Complete Fiction of Nella Larsen – Passing, Quicksand and The Stories. New York: Anchor Books, 2001, p. 164.