Final answer:
The physical life in Snowpiercer is maintained by a closed ecosystem on the train, paralleling real-world concepts of resource management and sustainability challenges faced by humanity.
Step-by-step explanation:
The physical life of the inhabitants within the train in Snowpiercer is sustained and perpetuated through a closed ecosystem and resource management system that the train represents. Just like the mills and factories described in the passages, the train operates continuously, supporting life through mechanical and systemic controls. There are parallels to the challenges of human nature respecting resources and maintaining sustainability, as the train's population must refrain from overconsumption to ensure their survival in a perpetual, frost-laden journey. The imagery used is reminiscent of Jack London's Yukon setting, where enduring nature's hardships requires careful planning and consideration of the long-term conditions for survival.
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