Multiple choice

Name the device used by mountaineers for breathing at higher altitudes?

  1. Carbon Dioxide Cylinder

  2. Oxygen cylinder

  3. Air bags

  4. Water containers

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

At high altitudes, the air is thin and oxygen levels are low. Mountaineers carry oxygen cylinders to supplement their oxygen intake and prevent altitude sickness. Carbon dioxide would be harmful, and the other options are unrelated.