Final answer:
The physical life of Snowpiercer's inhabitants is sustained by maintaining a certain temperature, which is essential for thermoregulation and supporting metabolic processes within the train's environment. Therefore, the correct answer is option d) By maintaining a certain temperature
Step-by-step explanation:
The physical life of the inhabitants of the train in Snowpiercer is produced and reproduced mainly by maintaining a certain temperature within the train's environment.
This is critical because the rate of metabolic processes increases at very high or low temperatures, which can be detrimental to the inhabitants' health. Therefore, to ensure the survival and proper functioning of the organisms aboard, thermoregulation must be constantly managed.
Structures and mechanisms for heat conservation or heat shedding, akin to those in polar bears and humans, respectively, could be imagined in this setting. Additionally, maintaining temperature is essential for the preservation of the train's ecology and the overall well-being of its passengers.
The physical life of the inhabitants of the train in Snowpiercer is produced and reproduced through a combination of factors. First, constant physical activity is required to maintain their physical well-being. Second, consuming a balanced diet is essential to provide the necessary nutrients for their bodies.
Lastly, the rotation of the train's cabins ensures that they experience different environments and maintain a certain level of temperature regulation.
Therefore, the correct answer is option d) By maintaining a certain temperature