The reason glaciers are melting are because of man-made factors. Green house gas, emissions and aerosols are good examples of what man made factors are melting earths glaciers.
Pangea is the name of the giant landmass that once contained all of the continents.
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<span>C: Ethnicity is cultural identification with a particular place or group, whereas race is based on biological ancestry.</span>
The biggest reason why ancient Greece never chose a single King, and was dominated by smaller city-states instead, are the geographic features of the land where these cities were settled. The mountainous terrain, the isolation of the valleys, and the number of isolated islands would make it difficult for one person to govern it all.
Also, Greeks were famous for their aristocracy that prevented the forming of monarchies. Political independence of the city-states was constantly protected by the aristocracy and so, any individual who would want to conquer the territory would succeed for only a short time and would never have the glory and respect of a real king.