Answer:
supporting the Underground Railroad
Step-by-step explanation:
The Underground Railroad was not a literal railroad but a symbolic one that stood for the secret pathways followed by slaves to escape from their masters, as well as the houses, where they stayed in the course of their flight. In that period, the American slave masters frequently lost their slaves because they wanted to run away from the hardships they experienced. An example of such a loss is the one experienced by the master in this poster.
They fled to free states, that is, states in the United States where the slave trade was not allowed, or to countries like Canada that did not permit slave trade. The abolitionists who were against the slave trade supported the movement and aided their flight with these underground railroads.