I am pretty sure Osmosis sorry if Im wrong
The answer is C.
A is not specific
B has nothing to do with humans
C is specific enough and would be pretty handy
D makes no sense
Hope this helps!
You're correct because when birds hit their max altitude it's harder to breathe and to minimize the time of there flight they store immense amounts of oxygen in their lungs.
the answer is false
hope this helps and good luck!
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