Plantation owners relied on labor in order to make a large profit. Fill in that blank

Slave Labor

Explanation:

It was free since they didn't pay their slaves and mistreated them

export

Explanation:

Plantation economies rely on the export of cash crops as a source of income. Prominent crops included cotton, rubber, sugar cane, tobacco, figs, rice, kapok, sisal, and species in the genus Indigofera, used to produce indigo dye. The longer a crop's harvest period, the more efficient plantations become.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

silk

indigo  

rice

all the other answers are wrong