Examine the idea of Greek philosophers on the shape and size of the earth during the classical times.

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

Does anyone know the answers for these

Which area on the map would be most likely to have the most oil exploration in since the start of the 21st century? a) b) c) d) plz me