Slavery and enslavement are the state and condition of being a slave, who cannot quit their service to another person and is treated like property. In chattel slavery, the enslaved person is legally rendered the personal property (chattel) of the slave owner.
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The word that would fit in the blank is "currency". Exchange rate is the rate of one currency will be exchanged another currency of another country. This difference in the values of the currency affect a nation's ability to import or sell exports consequently it affects our standard of living.
