Which amendment provides the right to compulsory process for securing witnesses?

The Sixth Amendment is the correct choice as it explicitly ensures the right to compulsory process for securing witnesses on behalf of the accused in a criminal trial. This means that individuals have the constitutional right to compel witnesses to testify in their favor, which is a vital part of ensuring a fair trial. This provision is fundamental in the justice system, as it helps to uphold the principle that both sides in a legal dispute should have the opportunity to present evidence and witnesses.

In contrast, the other amendments listed do not address the issue of securing witnesses. The Fourth Amendment focuses on protection against unreasonable searches and seizures, the Fifth Amendment addresses rights related to self-incrimination and due process, and the Eighth Amendment deals with prohibitions against excessive bail and cruel and unusual punishment. Each of these amendments serves important functions but does not relate specifically to the right to compel witness testimony as highlighted in the Sixth Amendment.