The western coast of africa has long been known by what nickname? gold coast silver coast salt coast iron coast

The western coast of Africa has long been known by the nickname of Salt Coast

Explanation:

The west coast of Africa was a big producer of Salt in one of its areas and it was not the only big production there, they also produced big quantities of gold, the merchants exchange gold for salt in Ghana, this lands gain the name of the thing they were rich of, being this a very good plays for business all invaders wanted to get there and a lot of people wanted to exchange with them, which created the addition of taxes and different structures and security to protect the locals.

a because i tried to vote with just my college id and the answer was no