Question

The mountaineers carry oxygen with them because:
(a) At an altitude of more than 5 km there is no air.
(b) The amount of air available to a person is less than that available on the ground.
(c) The temperature of air is higher than that on the ground.
(d) The pressure of air is higher than that on the ground.
Please give answer of this question.​

Answer 1

Answer:

Mountaineers carry oxygen cylinders while going to high mountain peaks because altitude increases as they climb the mountain. The amount of oxygen decreases as the altitude increases. The reason for the decrease in the amount of oxygen gas is because trees are not found in high altitudes.

Answer 2

Answer:

option no d is the answer