Final answer:
The central ideas of the text on the South seceding are focused on the reasons behind the secession, primarily linked to slavery and state rights, and the significant consequences this action had on the entire nation, such as triggering the Civil War and its economic and social impacts.
Step-by-step explanation:
Among the central ideas of the text on the South seceding, the two concepts that stand out are b) the reasons behind the secession of Southern states and c) the consequences of secession for the United States as a whole. The text indicates that the primary reasons for secession were fundamentally tied to the institution of slavery, which was interwoven with the economic, social, and political fabric of the Confederacy. Moreover, the secession of the Southern states had significant repercussions for the entire nation, leading to the Civil War and the resulting political and economic upheaval on both sides.
The Southern economy's heavy reliance on slavery for crops like cotton was pivotal, as was the ideology of white supremacy and state rights. These factors led to the creation of the Confederate States of America. The subsequent Civil War had substantial economic and social impacts, disrupting industries, causing inflation in the South, and eventually forcing the South to surrender, putting an end to their bid for independence.