Question

We find it difficult to breathe when we climb up mountains. Give Reason.

Answer 1

Answer:

because the oxygen level and air pressure is low is that's my mountain climbers carry oxygen cylinder with them

Answer 2

Answer:

air become thin

Explanation:

air is consisting of weight as we all know.

as the air has weight it is obvious that gravitational pull will be working on it, so air try to stay close to earth surface.

as the altitude increases the air available eill became less so it is hare to breathe.