Final answer:
The sentences that most clearly depict historical elements in the excerpt are those mentioning President Arthur and testifying to the historical significance of the event, which is the opening of the Brooklyn Bridge.
Step-by-step explanation:
In the excerpt from “Behold the Brooklyn Bridge,” the two sentences that most clearly describe historical elements are: “As we neared the other side of the river, I saw a group of people chattering excitedly. ‘Papa, what’s going on there?’ I asked curiously.” and “Papa glanced over toward the crowd. ‘Why that’s President Arthur himself!’ he exclaimed.” These sentences depict the historical context by referring to President Arthur and by illustrating the significance of the event being experienced by the characters. In the story, this reflects the celebration of the completion of the Brooklyn Bridge in 1883, embodying American progress in the post-Civil War era.
Historical fiction often integrates characters into a factual setting, where they interact with historical figures or witness actual events. The narrative remains faithful to historical truth while the characters' personal experiences and reactions may be fictional. This fusion allows readers to engage with history on a personal level, achieving a balance between educational content and immersive storytelling.