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Answer:
Chemical composition
Explanation:
Minerals are usually classified according to their chemical composition. The chemical composition of a mineral is usually identified through the use of a mass spectrometer. However, to some extent, minerals are also classified according to their physical properties, such as color, shape and sharpness. This is a method that is much more simple and requires less money and time.
They are more likely to contract water borne diseases due to the lack of proper drinking water.
Answer:
ecause it was colder glaciers formed from ocean water.
