During the antebellum period, what group was at the top of the south's social hierarchy?

planters
clergy
merchants
teachers

If by planters you mean "Plantation owners", then it is planters. Plantation owners were at the top of the South's social hierarchy because they possessed large plots of land, yielding much income from the that land, and with the income came political power.

Um well north korea is a very harsh place because students go to school for 24 hours and almost never rest and the president is well i think sends to much bomb that’s what i think

They were constantly being overlooked as a people and were being controlled by people who weren't really native to their homeland.