Final answer:
The text excerpts contribute to a tense, mysterious, and isolated atmosphere, highlighting the emotional impact of the characters' surroundings and experiences.
Step-by-step explanation:
The excerpts contribute to the scene's overall atmosphere by creating a sense of unease, mystery, and isolation. Through the use of descriptive language and imagery, the authors convey a tension that grips the characters, whether it's the feeling of being watched, the unsettling stillness of a room, or the abrupt disruption of silence. These passages often illustrate a moment of transition or realization for the characters, heightening the impact of the surrounding environment on their emotional state.