Question

(Read all options carefully and answer only if you know) Nose bleeding may occur at high altitude because
1) The atmospheric pressure decreases
2) The oxygen content of the atmosphere decreases
3) The atmospheric pressure increases
4) There are strong air currents at high altitude​

Answer 1

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1) The atmospheric pressure decreases

Answer 2

Answer:

Either 2 or 3, either would make sense, but please mark as brainliest .^^

Explanation: