Which atmospheric zone would require supplemental oxygen for sustained physiological function?

The correct choice refers to the Physiological Deficient Zone, which is characterized by reduced atmospheric pressure and decreased oxygen availability. At altitudes typically above 10,000 feet, the partial pressure of oxygen in the atmosphere diminishes significantly, leading to a condition known as hypoxia, where the body does not receive enough oxygen to function properly.

In this zone, individuals may experience symptoms of altitude sickness, including headaches, dizziness, and impaired cognitive function, as a result of inadequate oxygen levels. Therefore, supplemental oxygen is necessary for sustained physiological function to prevent these adverse effects.

The other zones mentioned do not specifically necessitate supplemental oxygen for normal physiological processes. The Physiological Zone generally refers to altitudes where the body can function without significant oxygen support, while the Space Equivalent Zone pertains to conditions experienced in outer space where oxygen is not available at all, requiring specialized life support systems rather than standard supplemental oxygen methods. The Thermal Zone primarily focuses on temperature effects rather than hypoxia.