Due to the many different languages spoken by merchants and traders and the need to keep locations of some resources secret, West Africans traded and exchanged their goods indirectly. They never saw each other, yet successfully conducted trade. This unique method of trade was called . *

Silent Trade

Explanation:

Silent trade is a form of the old style of trading which is even more common to the West Africans.

It involves a situation whereby traders who do not understand each other's language, tried to perform trade.

To trade successfully, for example, PARTY A would leave trade goods in a secret but a known place to the buying party, and make a loud signal that good is left somewhere. PARTY B would then get to the place, examine the goods, and deposit their object of exchange that they wanted to exchange, and withdraw.

a system in which products were made rapidly by machines

mass production/ assembly line production