Why would solar energy not work well in the arctic

Why did large numbers of african migrate to the americas

In what country/region do women comprise part of national government than anywhere else in the world?

What did the pattern of earthquakes in the wadati-benioff seafloor zones show scientists? a.) earthquakes occur where the ocean floor reaches its highest temperatures. b.) many earthquakes take place 700 kilometers below the seafloor. c.) slabs of ocean floor return to the mantle in subduction zones. d.) ocean - trenches cause earthquakes.