Eastern boundary currents are associated with the cooling off of the ocean waters. These currents originate from both of the poles, they bring cold, shallow, slow water towards the lower latitudes and cools of the water near the Equator. Once there they are warming up and move in the opposite direction as westward warm currents.
Os itens usados para o comércio nas colônias do sul das Colônias incluíam tabaco, algodão, arroz, índigo (corante), madeira, peles, produtos agrícolas, muitos dos quais foram produzidos nas plantações de escravos.
The answer is D, hope this helps.
1the present of raw material
2the need for markets.
3) the search for labour force.