Final answer:
The statement `So many African slaves died under Spanish rule (the encomienda system) that the colonists started importing Native Americans in 1517` is TRUE
Step-by-step explanation:
True, many African slaves died under Spanish rule through the encomienda system in the early 1500s. The encomienda system was a forced labor system where indigenous peoples were initially used for labor, but their population declined rapidly due to diseases and harsh conditions. As a result, the Spanish colonists began importing African slaves to replace the indigenous labor force.
By 1517, the Spanish colonists had started importing Native Americans as well, as there were not enough indigenous people to meet the demands for physical labor involved in exploiting the natural wealth of the continent. This was due to the declining indigenous population and the need for a consistent and plentiful labor supply.