The correct answer is option 3, Westerlies. The term "Roaring Forties" refers to strong westerly winds that are found in the Southern Hemisphere between the latitudes of 40 and 50 degrees. These winds are caused by the rotation of the Earth and the distribution of air pressure in the atmosphere. They are called "Roaring Forties" because they are known for their strength and constant blowing. These winds have a significant impact on weather patterns and can influence ocean currents as well. It is important to note that the other options are not the correct answer. Trade winds are easterly winds found in tropical regions, planetary winds are a general term for global wind patterns, and polar winds are cold winds that blow from the polar regions.