Question

it has been found that people living in very high mountains have more red blood cells as compared to people living in plains... why... give reason....​

Answer 1

Explanation:

People living in the mountains have more red corpuscles in their blood than people living in the plains because the low air pressure requires more red blood corpuscles to supply the body cells with oxygen.

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Answer 2

-- It is because there is less amount of oxygen present on the hilly areas. Thus, to increase the rate of breathing more and more red blood cells are produced.

Whereas the presence of oxygen is comparitively adequate than that of hilly areas in the plains.

I hope this clears ur doubt