Final answer:
The excerpts highlight the dramatic and pivotal role of communication in narratives, especially involving nurses in emergencies. The nurse rushing in with news is a device used to introduce tension and critical developments in the story.
Step-by-step explanation:
The excerpts presented appear to come from various literary works featuring scenes where news or information is conveyed rapidly and often with dramatic consequences. The urgency with which information travels, the sense of immediacy, and the serious nature of the tidings are recurring themes. Whether it's news of a health crisis or urgent missives in times of war, the texts demonstrate how communication plays a critical role in narrative development and character response.
One commonality in the provided texts is the depiction of nurses responding to emergencies or bearing news, which becomes part of the narrative's tension. In the context of the question, "when the nurse rushes in with news about the boys," it suggests that the information being conveyed is of critical importance, often dealing with life and death situations. This is supported by the rest of the excerpts which either depict similar scenarios of urgency and crisis or the importance of communication in tense situations.
Thus, in narratives, the entry of a nurse with news typically signals a turning point or a moment of heightened drama where characters' reactions and the unfolding events are central to the story's progression.