Final answer:
The Sixth Amendment is the constitutional provision that guarantees citizens the right to be tried by a jury in criminal cases.
Step-by-step explanation:
Amendment Guaranteeing Trial by Jury in Criminal Cases:
The amendment that requires citizens to be tried by a jury in criminal cases is the Sixth Amendment. This amendment is crucial for maintaining fairness in the criminal justice system as it guarantees the rights of the accused to have a speedy and public trial, an impartial jury the right to be informed of the nature and cause of the accusation; to be confronted with the witnesses against them; to have compulsory process for obtaining witnesses in their favor and to have the Assistance of Counsel for their defense.
The provision reflects the importance of a jury in making sure that the government respects and upholds the rights of its citizens.