Final answer:
The difficulty of life at Naoetsu is described by the lack of camaraderie.
Step-by-step explanation:
The difficulty of life at Naoetsu is best described by option D, the lack of camaraderie. In Naoetsu, the prisoners of war experienced a sense of isolation and a lack of support or companionship. This made their daily lives challenging and added to their overall difficulties in the camp.
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