7 buses and 13 empty seat :)
Explanation:
its right ;)
Answer:
a
Explanation:
because all of the other answers don't make sense.
Answer:
The air at higher altitudes is colder, less dense, and contains fewer oxygen molecules. This means that you need to take more breaths in order to get the same amount of oxygen as you would at lower altitudes. The higher the elevation, the more difficult breathing becomes
Explanation:
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