The correct answer is: The air is thinner.
As you climb up a high mountain, the concentration of oxygen in the air decreases, making it harder to breathe. This is often referred to as "thin air."
Why is it harder to breathe when
climbing up a high mountain?
(1 point)
The air compresses the lungs.
The air is thinner.
The air pressure increases.
The air has more moisture.
1 answer