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Illusion [34]
3 years ago
14

NEED HELP ASAP!! Please no links!!

Biology
2 answers:
Dmitriy789 [7]3 years ago
5 0

Answer:b) The air at high altitudes are less dense, so its harder to breathe.

Explanation:

AS altitude increases, the air pressure drops. This reduces the amount of gas molecules in the air so the air becomes less dense compared to air closer to sea level.

andrew-mc [135]3 years ago
4 0
B because it would be harder to breathe
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