En el cuerpo humano, todas las reacciones químicas ocurren al mismo tiempo y permite dar respuesta rapida y eficiente a los cambios interiores y exteriores

chert is a sedimentary rock composed of microcrystalline or cryptocrystalline silica. with this little bit of information, you can come to the conclusion that your answer is c.  

explanation:

b. climate change will cause an increase in biodiversity of all ecosystems.

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answer increasing the intensity, duration,and frequency of exercise progressively;