Please help me to anwser these questions I have attached the photo.
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A. We find it difficult to breathe when we climb mountains because the layers of atmosphere become thinner at high altitudes. This means that there is less pressure to push the air into the lungs and a lower percentage of Oxygen in the air. This makes it harder to breath.
B. dynamic means full of energy or movements. entity means having its own identity or very diffrent from other.
The atmosphere is the most dynamic entity because of its composition. Large masses of air are being moved up and down and across the surface of the Earth.
C. troposphere is lowest layer of earth and 75% gas present in this layer.
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