Question

which of these was a direct result of the failed slave revolt of nat turner in 1831?
president buchanan was elected for a second term, putting off the slavery conflict for another decade.
laws greatly restricting the legal rights of free blacks and slaves were passed throughout the south.
congress passed a law that would phase out the importation of african slaves in the coming decade.
southern legislatures reexamined the moral foundation of keeping millions of blacks as slaves.

Explanation:

Nat Turner's 1831 revolt terrified Southern slaveholders, who responded by enacting harsh laws to control enslaved people and free Black people, limiting their movement, assembly, and education to prevent future uprisings. The other options are incorrect: Buchanan was elected much later (1856), the ban on slave importation was 1808, and Southern leaders doubled down on slavery rather than questioning its morality.

Answer:

Laws greatly restricting the legal rights of free blacks and slaves were passed throughout the South.