The models that show global air circulation are the arctic circle and tropic of Capricorn that identify the wind directions.
What is wind direction?
Wind direction is learned by the direction it is coming from. A north wind, for instance, blows from the north to the south. Onshore and offshore winds are the exceptions.
From the image given below, the arctic circle and tropic of Capricorn are the two models that shows global air circulation. Typically, wind direction is expressed in degrees or cardinal directions. The prevailing winds are those that are in force at any given time due to the Earth's axis rotation.
Therefore, option A, and D are correct.
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