Which amendment abolished slavery in the United States?

The 13th Amendment is the correct answer because it explicitly abolished slavery and involuntary servitude in the United States, except as punishment for a crime. Ratified on December 6, 1865, it marked a significant turning point in American history, as it legally ended the institution of slavery that had existed for centuries. This amendment laid the groundwork for further civil rights advancements in the United States by promoting freedom and equality under the law.

The other amendments listed pertain to different rights and issues; for example, the 15th Amendment addresses voting rights for men regardless of race, the 19th Amendment grants women the right to vote, and the 21st Amendment repeals Prohibition. Each of these amendments contributes to the evolving landscape of rights in America but does not concern the abolition of slavery.