Why did the south become more reliant upon slavery than the north?

The south became more reliant on slaves because their entire economy was built around slaves. They would work in the fields for long , dreadful hours, until the invention of the cotton gin by Eli Whitney made it much cheaper to make and faster to make also. With little to no industry the south has few other ways of making money.

Explanation:

monarchy doesn’t have to have the hereditary element. there have been elective monarchies in the past where you choose your king-for-life and when he dies elect someone else for the job.

the answer is a. since they were a huge producer of cotton and wanted the most money for it.