Based on the map given, it can be deduced that the landform is the Great Rift Valley.
A landform simply means a natural physical feature of the surface of the Earth that's defined by its forms and location.
From the map, the Great Rift Valley is illustrated. It is a series of contiguous geographic trenches, that is approximately 7,000 kilometres in total length.
Slavery in America started in 1619, when a Dutch ship brought 20 African slaves ... in North America turned to African slaves as a cheaper, more plentiful labor ...