The correct options are
A Due to the mixture of both cold and warm currents, there is a large amount of marine life present in the region.
B Due to the mixture of cold and warm currents, a thick, dense fog develops over the surface of the ocean in these regions.
Due to the mixture of cold and warm currents, a thick, dense fog develops over the surface of the ocean in these regions. Also, there is a large amount of marine life present in the region.