Farming/ slavery.
This answer really depends on what the question is asking, the southern economy banked heavily off of farming, BUT it was impossible to provide and have such an abundance of crops without slavery. So, it depends on the options you have.
Hope this helps, man!
Because, it was a substitute teacher who taught students about the theory of evolution of humans in school, when in Tennessee there was a law called the Butler act that prohibited such teachings.
A representative serves 2 years and a senator serves 6 years.