Read the excerpt from “The Scarlet Ibis.”

1 It’s strange that all this is still so clear to me, now that the summer has long since fled and time has had its way. 2 A grindstone stands where the bleeding tree stood, just outside the kitchen door, and now if an oriole sings in the elm, its song seems to die up in the leaves, a silvery dust. 3 The flower garden is prim, the house a gleaming white, and the pale fence across the yard stands straight and spruce. 4 But sometimes (like right now), as I sit in the cool, green-draped parlor, the grindstone begins to turn, and time with all its changes is ground away—and I remember Doodle.

Which sentence from the excerpt is foreshadowing and why?