Why did the coast of gold coast became a commercial hotbed of European African trade from 1550-1850

Nevertheless, by the 1920s the student bodies had become hotbeds of Indian ... Britain did this, the nationalists claimed, by unfair trade, by the restraint on ... (2012), Britain's Oceanic Empire: Atlantic and Indian Ocean Worlds, C. 1550-1850, ... in the town of Machilipatnam on the Coromandel Coast of the Bay of Bengal.