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:
Answer:
Son empresas que se dedican a la producción, el resultado de su actividad son productos trasformando materias primas en el proceso de producción. Se denominan por su actividad empresas del sector secundario.
Explanation:
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The answer to this is April 6, 1896
