Today, slaves are usually victims of the sex trade.
The purpose for a railroad was for transportation for slaves when they were first mad and now they are used for all kinds of things
There are 25 million slaves around the world today ( including the United States) and a majority of them are children and women as sex slaves. Isis has taken a lot of women as slaves and in Southeast Asia many children are used as sex slaves. China has slaves that are forced to work in work farms.
The females were used in the households taking care of the children and the households and the males were used in the open fields working the farms. even though some female slaves were used for that purpose.
In the United States slaves were used to do the daily duties that were considered labor intensive, or labor that could be passed on to others. For example, female slaves commonly worked in the house, cooking, cleaning, things a maid today would do. Male slaves did more labor intensive jobs, working the the fields, building, etc. Of course there aren't the only jobs, but a small list to give you an idea of their purpose.
There are still slaves today.
America sent freed slaves for the purpose of colonization to Liberia.
A towpath was a path alongside a canal or river used by animals or slaves towing boats.
The females were used in the households taking care of the children and the households and the males were used in the open fields working the farms. even though some female slaves were used for that purpose.
African American slaves were mostly used as farm workers, particularly for growing cotton. However, the owner of a slave was free to use that slave for any purpose. Some slaves were used as servants, effectively butlers and housekeepers. There were various other uses.
Slavery is now illegal in the US. Therefore there should be no slaves in the US today.
Spirituals were used in worship by African-American slaves on southern plantations. They were also used to deliver messages that the slaves did not want the plantation owners to understand.
For the most part human trafficking involves women and children who are used as sex slaves. Today, there are 25 million slaves and most are used in the sex trafficking and porn industry.