Explanation

The planetary wind systems — trade winds, westerlies and polar easterlies — arise from the latitudinal variation of atmospheric heating that creates the pressure belts (statement 1), are modified in strength and direction by the distribution of continents and oceans (statement 2), and are deflected by the Earth's rotation through the Coriolis force (statement 3). All three factors govern the pattern. The Coriolis effect deflects these winds rightward in the Northern Hemisphere and leftward in the Southern.