If a person were 62 miles high and stationary above a point on the ground, several factors would come into play during their descent. Let's examine each of the potential causes of fatality:
Lack of Oxygen: As the person falls from such a high altitude, the lack of oxygen at higher altitudes would indeed be a significant concern. However, at approximately 62 miles (328,000 feet or 100 kilometers) above the ground, they would be in the vacuum of space where there is no atmosphere and therefore no oxygen. Consequently, the person would not have any breathable air even before they started falling. Therefore, lack of oxygen would not be a factor in causing their death during the descent.
Atmospheric Friction (Heat): As the person descends through the Earth's atmosphere, they would experience tremendous atmospheric friction due to their high velocity. The intense heat generated by this friction, also known as atmospheric reentry, is a concern for spacecraft and meteoroids entering the atmosphere. However, since the person in question is falling from a stationary position rather than entering from orbit, their velocity would not be high enough to generate significant heat through atmospheric friction. Therefore, atmospheric friction would not be a primary cause of death in this scenario.
Impact: The impact with the ground would ultimately be the cause of the person's fatality. After falling from such a height, they would reach an extremely high velocity during their descent. When they hit the ground, the impact would be catastrophic and result in immediate death due to the tremendous forces involved. The impact energy would be distributed throughout their body, causing severe damage to vital organs and bodily structures.
In conclusion, the impact with the ground would kill the person first in this scenario, as the lack of oxygen and atmospheric friction would not significantly contribute to their demise during the fall. It is worth noting that such a scenario is not physically possible with our current technology and understanding of physics.