The description best fits the kingdoms of Ghana and Songhai is the trading states of West Africa. Back then, the kingdom of Ghana and Songhai was really famous around the world for their Gold Resources. A lot of European merchants came to these kingdom to do a trade
Light bulbs were the power source used in factories during the industrialization
<span>Besides connecting the eastern United States with the western United States, the Transcontinental Railroad was also instrumental in providing employment for thousands of Americans. </span>
