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During a school trip to 'Rohtang Pass', ...

During a school trip to 'Rohtang Pass', one of your classmates suddenly developed 'altitude sickness'. But, she recovered after sometime.
What caused the sickness?

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### Step-by-Step Solution: 1. **Understanding Altitude Sickness**: Altitude sickness, also known as acute mountain sickness (AMS), occurs when individuals ascend to high altitudes too quickly. It is commonly experienced at elevations above 2,500 meters (8,200 feet). 2. **Cause of Altitude Sickness**: The primary cause of altitude sickness is the decrease in atmospheric pressure at high altitudes. As altitude increases, the air pressure decreases, which means there is less oxygen available in the air. 3. **Oxygen Demand**: Our bodies require a certain amount of oxygen to function properly. At high altitudes, the lower atmospheric pressure leads to a reduced availability of oxygen. This creates a situation where the body’s oxygen demand cannot be met. ...
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