Final answer:
The 'Three Sisters' metaphorically represent the companionship and ecological interdependence of corn, beans, and squash in Native American agriculture, without specifying a literal location at the beginning of a story.
Step-by-step explanation:
The Three Sisters do not refer to characters in a narrative, but rather to the agricultural staples (corn, beans, and squash) that are traditionally grown together by various Indigenous peoples in North America. The text provided does not specify a physical location where the 'Three Sisters' are living at the beginning of a story but metaphorically speaks to their existence as sustaining life for Native American communities. This concept of the Three Sisters represents companionship and ecological interdependence rather than a literal habitation.