The correct answer is Option 3. Explanation & Key Takeaways: Trade Winds: • They are the pattern of easterly surface winds found in the tropics towards the Earth’s equator. • The trade winds act as the steering flow for tropical cyclones that form over the world’s oceans. • These are steady high-pressure winds that blow from 30^(0)N and S and almost towards the equatorial low-pressure belt. • Formation: • They are formed when the sun rays fall vertically over the equatorial region, because of which the air becomes hot and goes upwards. • As the pressure is less upward, the rising air gets space for expansion and gradually, the air becomes cool and very dense. • The cool air could not come down directly due to the presence of warm air at the lower levels. • As a result, the air moves towards north and south directions while remaining in the upper atmosphere. • On moving up to 30^(0) latitudes, some part of this air comes down and blows towards the equatorial low-pressure belts. • According to Ferrels Law, the trade wind blows from the northeast in the northern hemisphere and south-east in the southern hemisphere. Related Concepts: • Characteristics: • When this trade wind originates in the high-pressure zones, the sky remains clear, the weather appears hot and dry. • Most of the famous deserts of the world such as the Libyan desert, the Sahara desert, the Arabian desert in the northern hemisphere and the Kalahari desert in the southern hemisphere are located close to this zone.