Explanation:
1. The most fitting adjective that describes the atmosphere in this excerpt is "never-ending". It illustrates how the characters' feelings about their circumstances contribute to a perpetual night. This extended darkness is caused by their numbness and the looming question of when their deaths will arrive.
2. The line "Our minds numb with indifference." captures the atmosphere perfectly, as it indicates the characters' apathy. They exhibit no fear regarding death, recognizing it as inevitable, and ponder when it may occur without it holding significance anymore. Their numbness reveals their surrender to the situation.
3. This numbness depicted reflects the broader meaning of the story. The characters find themselves in a chilling environment and stick together out of a necessity for survival. With heavy minds recalling memories, the author conveys that in dire situations, individuals may become indifferent and cease to be concerned about life. As the excerpt concludes, their negative thoughts exacerbate their predicament, creating a never-ending night that expands with each thought.
The option that would appropriately complete the statement above is B. CENTRAL IDEA. The central idea acts as the core element that brings together the key details in a text, summarizing the essence of what those details convey. I hope this response adequately addresses your inquiry.