How does mark twain’s use of the mississippi river as the setting for the novel define the theme of freedom versus slavery?

Hello, my name is Matt and I'll be your BrainGem helper today! The Mississippi River had lots of plantations near it. On Plantations there were dozens of slaves working. This was also were there was a large black community. I went to a planation 2 years ago. It was called the Oak Valley Plantation. (Just if you want to give it a Google). I hope that we at BrainGem can help you in the future!