S you travel up into the mountains, you notice discomfort in your ears. This is due to

A) the low pressure in your ears.

B) the low pressure at the bottom of the mountain.

C) the low air pressure in the mountains.

D) the high air pressure in the mountains.

What causes pressure in the ears?

Ear - blocked at high altitudes. The air pressure outside of your body changes as altitude changes. This creates a difference in pressure on the two sides of the eardrum. You may feel pressure and blockage in the ears as a result

So the answer is D) the high air pressure in the mountains.