The last stage in the evolutionary track of a star depends upon the star’s mass. discuss the various possible ending stage of stars and relate the cause of the outcome of each to their mass.

In 1915 the german geologist and meteorologist alfred wegener first proposed the theory of continental drift, which states that parts of the earth's crust slowly drift atop a liquid core. the fossil record supports and gives credibility to the theories of continental drift and plate tectonics.

List 3 factors commonly used to select the location of a city

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