The words describe a very specific relation to slavery. It is in a sentence below:
Step-by-step explanation:
The productivity of the farms had drastically decreased as the south was only able to acquire slaves from domestic slave trade making them costly.
This statement delves into the specific point of time in the mid 19th century when there was the end of the Atlantic slave trade and the essential pool of slaves in the country was what was available to them.
Thus, it was seen that the slaves became subject to domestic trade and had a higher price now.