The winds that blow from the Subtropical High Pressure Systems (STHP) called the trade winds because it helped in trade when trade and commerce was mostly conducted with the help of sailing vessels. Those vessels required wind for travelling. These winds were thus called trade winds. I hope the answer helps.
These changes in air pressure and wind speed cause<span> warm surface water to move eastward along the Equator, from the western Pacific to the coast of northern </span>South America<span>. </span>
