Answer:
The best answer to the question: Which story element does this line provide, would be: Setting.
Step-by-step explanation:
When writing stories, one element that is really important to give to readers is the setting of it, meaning, where the story is, or will be, developing itself. Making it mysterious, almost as if the very key to the question that will be developed in the story were hidden in it, is a really intelligent thing to do, as it is what we see in this text. The line itself tells us where the character, Shelby is located, what characteristics there are, and it also gives us a clue that maybe this will be a suspense, or mystery story. The simple line opens us to the setting, which is why the answer is the last one, and it also feeds our interest to learn why the tone of it is so suspensful.