3 years ago

5) The troposphere of the Earth's atmosphere supports life because it contains

Biology

1 answer:

Alexeev081 [22]3 years ago

8 0

Answer:

I think its A

Explanation:

Because the reason why airplane have closed windows is because we can't breathe in carbon dioxide when we go up. Of course there is oxygen just not a lot as we go up. Why would there be helium in the air? We would sound weird when we skydive.

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