Why is it harder to breathe when climbing up a high mountain?

(1 poin

The air is thinner

The air compresses the lungs

The air has more moisture

The air pressure increases.

1 answer

When climbing up a high mountain, it is harder to breathe primarily because the air is thinner. At higher altitudes, there is less oxygen available in the atmosphere, which makes it more difficult to get enough oxygen into the body. The other options do not accurately describe the physiological conditions at high altitudes.