In the fairy tale "Hansel and Gretel," a brother and sister find a house made of candy in the forest, are invited inside by an old woman, and are almost cooked and eaten by the woman, who turns out to be a witch. In "Little Red Riding Hood," a little girl is on her way through the forest to see her grandmother and tells a wolf where the grandmother lives. The wolf races ahead of the little girl and eats her grandmother.
What recurring theme is present in both stories?