Final answer:
The 13th, 14th, and 15th Amendments addressed issues in the United States after the Civil War by enacting changes in society regarding slavery, U.S. citizenship, and suffrage.
Step-by-step explanation:
The 13th Amendment addressed the issue of slavery in the United States after the Civil War. It abolished slavery and involuntary servitude, except as punishment for a crime.
The 14th Amendment addressed the issue of defining U.S. citizens. It granted citizenship to all persons born or naturalized in the United States, including former slaves, and protected the rights of citizens.
The 15th Amendment addressed the issue of suffrage. It granted the right to vote to African American men by stating that the right to vote cannot be denied or abridged based on race, color, or previous condition of servitude.
Learn more about Changes in society after the Civil War