What makes Europe’s megalopolis challenge unique?

Why does less erosion & more deposition take place on the outside bank of a meander?

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today