Read the excerpt from part 4 of Zeitoun.Zeitoun’s heart was thrumming. They saw no civilians, no hospital or humanitarian-aid workers, as had been common in areas like the Napoleon–St. Charles staging ground. This was different. This was entirely martial, and the mood was tense.Zeitoun is considering

Zeitoun notices that the area has no civilians or aid workers and is instead entirely military, with a tense mood. This observation suggests he is thinking about how hostile and militarized his situation has become. The best answer is “the hostile nature of his internment,” not the city’s geography or the resources available to flood victims.

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