Answer:
It gives specific details about the tree.
Step-by-step explanation:
The effect of the phrase “ancient oak tree” in Paragraph 1 of the passage actually gives specific details about the tree.
The narrator was actually describing the type of oak tree that was scratching his roof. It gives the reader an insight of what type of oak tree the narrator was talking. The narrator was being specific which helps every reader to grasp the narration of the narrator easily.