How does the author's use of flashback affect the story? it generates uncertainty by forcing the narrator and her parents to doubt what they remember about great-aunt gertrude. it adds tension by making the narrator and her relatives uncertain about exactly what they are going to find in slovakia. it ensures clarity by providing all necessary background information in the opening paragraphs. it results in a more intimate story by revealing the narrator's innermost thoughts and feelings. (story is secret in slovakia)