Rice and indigo the main cash crops of South Carolina needed the right kind of climate and techniques to be cultivated these requirements led to the rise of

slavery

Explanation:

With the Carolinas being very economically motivated, through rice and indigo cultivation, there were lots of exports, there was a need for slave labor. As more European migrants came to America and more crops were planted, there was an even bigger need for slaves, hence this led to the rise of slavery.