Why do mountainers and sea divers carry oxygen cylinders with them while climbing mountains and swimming in the sea?

Answer 1

A climber carries an oxygen cylinder on their back because it helps him/her to breathe easier. On high altitude mountains like Mount Everest the air is so thin it makes it very hard for anyone to breathe without extra oxygen from a cylinder.

Answer 2

Mountaineers carry oxygen cylinders when climbing mountains of extreme altitude like Mount Everest. This is because the higher you climb the less oxygen there is to breathe.

Answer 3

They carry the oxygen cylinders because they are needed to breathe. On a high mountain the air is so thin it is very hard to breathe so this oxygen is there lifeline.

Answer 4

Climbers carry oxygen cylinders on high mountains because there is less oxygen than there is at sea level.