Please help me !! pleaseee

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

Lines of longitude are like stripes from the top of the globe down to the bottom virtually slicing the earth like an orange

In the 1400s, portugal’s economy was based on a. industry b. exports c. finance d. trade