Question

the mountain II carry oxygen with them because​

Answer 1

Answer:

Because at the level of mountain or hilly areas that amount of oxygen is very less in the environment that's why most efficient supply of oxygen they carry oxygen with them..

Hope it is helpful to you...

Answer 2

Answer:

mountaineers carry oxygen cylinder with them because when climbing mountains, as the altitude rises the amount of oxygen in the air decreases(due to lack of trees at high altitudes)because of which mountaineers can suffer from dizziness