Which amendment provides due process protections at the state level?

The Fourteenth Amendment is the correct choice because it explicitly extends due process protections to the states. Ratified in 1868, this amendment states in its Due Process Clause that no state shall "deprive any person of life, liberty, or property, without due process of law." This inclusion was crucial in ensuring that the protections afforded by the Constitution are not just limited to the federal government but apply equally to state actions.

In contrast, the Fifth Amendment primarily applies to the federal government and contains its own due process clause, prohibiting the federal government from depriving individuals of due process. The Third Amendment addresses the quartering of soldiers and is unrelated to due process or rights concerning life, liberty, or property. The Seventh Amendment relates to the right to jury trials in civil cases and does not address due process either. The role of the Fourteenth Amendment in establishing these protections at the state level makes it a cornerstone of civil rights in America.