How did Portuguese slave trading off the western coast of Africa help contribute to the development of slavery in the Americas?

The Colonist (later the Americans) and the Portuguese were able to trade especially salves easily across the atlantic ocean making. hope this helps

Explanation:

no statements but ok.

the statement that best describes the idea of manifest destiny that was used in the 19th century would be that "it was fate that the united states would continue to  expand westward," since people thought the us was "destined" to do so. 

i think it would be a