Hypoxia
A) is the reduced availability of oxygen
B) occurs at higher altitudes because the atmosphere contains less oxygen than at sea level
C) exerts no stress on humans
D) is a problem for people living at sea level
E) is not a concern for humans

Question

Quizplus · Accepted Answer

Hypoxia is the reduced availability of oxygen, which can occur at any altitude, not just at high altitudes. It exerts stress on humans and can lead to altitude sickness or other health problems. Therefore, options B, C, D, and E are incorrect.