Which term describes the system of trade by which slaves were brought from Africa to the Americas

The Atlantic slave trade, transatlantic slave trade, or Euro-American slave trade involved the transportation by slave traders of enslaved African people, mainly to the Americas. The slave trade regularly used the triangular trade route and its Middle Passage, and existed from the 16th to the 19th centuries.

and contrast the 1920 and 2010 census reporting methodologies in an essay of about three hundred words