What was true about the Incan economy?

The main resources available to the Inca Empire were agricultural land and labor, mines (producing precious and prestigious metals such as gold, silver or copper), and fresh water, abundant everywhere except along the desert coast.

Explanation:

salve traders; raw materials

Explanation:

In the early days, the slave ships were a large cargo ships that were used to transport slaves and also other objects in the 17th to 19th century.  

It carries weapons and other fabrics to sell them in the ports of Africa to the warlords and the slave traders. And in return they exchange the salves to the Europe that were transported in these ships. The industries in Europe were depended on these slaves who produce the raw materials that are used in the industries in the Europe and in America.