In at least 100 words, explain the author's use of foreshadowing in Nadine Gordimer's "Once Upon a Time."

Here is an example of foreshadowing in the story. And you can take this and figure out and explain the use of foreshadowing from this excerpt:

Nadine Gordimer weaves many examples of foreshadowing into "Once Upon a Time." The frame story introduces the concept of fear. The idea of the subterranean mining tunnels that rock the narrator's house—dark, invisible, and cryptic—foreshadow the ethnic unrest that rocks the social fabric of the suburban community in the bedtime story.