The way to tell them apart from each other lies in the speed of the wind. When the speed of the wind is between 39 mph to 73 mph, the tropical depression developed (low pressured areas in the ocean that have the power to grow stronger) is classified as a tropical storm. Hurricanes are more intense and are formed over oceans with the wind speed reaching at least 74 mph. Hurricanes also have a noticeable eye in the center of the storm and tropical storms don't have any at all. Basically, a hurricane is a more intense version of a tropical storm that appear to be smaller compared to a tropical storm.
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Eastern boundary currents are associated with the cooling off of the ocean waters. These currents originate from both of the poles, they bring cold, shallow, slow water towards the lower latitudes and cools of the water near the Equator. Once there they are warming up and move in the opposite direction as westward warm currents.
The Correct choice is C
<u>Demography</u> is the study of human populations and how they grow or decline.