Final answer:
The foreshadowing sentence in the excerpt is Sentence 4.
Step-by-step explanation:
The sentence that is foreshadowing in the excerpt is Sentence 4
Sentence 4 foreshadows that Doodle is no longer present in the narrator's life. This creates anticipation for the reader, as they wonder what happened to Doodle and how it will affect the narrator.
Learn more about Foreshadowing in literature