What do plate boundaries and volcanoes have to do with the formation of minerals

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

What part did glaciers play in forming the great lakes?

What is the pattern of urbanisation around the word?