Hot air that is moving quickly towards the poles

attempting to balance the heat difference between the Equator and Poles.

Explanation:

Since the Sun is nearly overhead every day of the year, the area near the equator is very warm. ... It moves toward the North Pole or the South Pole, attempting to balance the heat difference between the Equator and Poles. If the Earth did not rotate, this air would flow directly to the North Pole or South Pole.

b) to encourage free trade

    racial conflict and discrimination has existed ever since man learned to kill with rocks and bones. these conflicts arose from disputes between territory, power, wealth, religion, or simple difference. some of the most infamous racial disputes include slavery, the holocaust, and the civil rights movement.

    these listed disputes often resulted in casualties from all sides. riots, wars, imprisonment, and lynching are all commonly associated with racial conflict on severe levels.

      however, racism is an improving issue in recent decades. people are being more accepting and welcoming of diverse populations. though, the world isn't perfect and it will take much more time, if ever, until the world is rid of racism.