Answer:
The Blind area
Explanation:
In the example, Patrice does not fall under the open area, because she wouldn't be shifted back and forth, it can't be called hidden area, because is a personal part of her in which her classmates don't know about.
It also cannot be called an unknown area that would imply whatever was happening to her, her classmates was not aware, including her.
Obviously she is under the blind area.
