Uni- having a single legislative chamber
Bi- having two branches or chambers
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!
It was rejected since he suggested that the acquired character which was an organism gain through its life experiences are transferred to its next Generation
Comment If I am Wrong :)
Answer:
promote international cooperation