Mountain sickness or altitude sickness, which can occur at elevations above 3000m, is caused by:
A)lack of oxygen
B)too much oxygen
C)lack of nitrogen
D)too much nitrogen

Question

Quizplus · Accepted Answer

Mountain sickness or altitude sickness is caused by lack of oxygen at high elevations. As the altitude increases, the air becomes thinner and the concentration of oxygen decreases, leading to symptoms such as headache, dizziness, and fatigue.

Mountain Sickness or Altitude Sickness, Which Can Occur at Elevations