According to the article about coral reefs, which of the following problems is threatening the world’s reefs today?
a.
heavy winds
b.
freezing air temperatures
c.
rising sea temperatures
d.
lower pollution

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity