"The Code of Hammurabi was one of the earliest and most complete written legal codes and was proclaimed by the Babylonian king Hammurabi, who reigned from 1792 to 1750 B.C. Hammurabi expanded the city-state of Babylon along the Euphrates River to unite all of southern Mesopotamia."
Hope this helps :)
So lets say you found farming tools then a secondary source would be like telling how they farmed so you can see how they used those tools. in an example say i said that the native Americans rode on horses were did they ride those horses? i hope this helps
No it wasn't THE first suspension bridge in america. THE first suspension bridge in america was the wire bridge at fairmount in philadelphia.