The last one is correct.
Hope i helped!
Answer:
I believe the correct answer is tobacco.
Explanation:
Many southern states grew tobacco, as it was also a huge cash crop.
Answer:
The answer is, It lowered as many Black Americans were sold into slavery
It could be considered a social system because of the way it is organized. First of all, it might present cultural fusion, that is to say; religion, technology, etc are key elements for its functioning. Then, people who work in the trade road need a language. There can be found a misture of culture due to the amount of people working in this system. As regards religion, it might be said that the Silk Road helps to its expansion and spreading.