Which of the following is a legal document affirming the truth of a statement in a court?

An affidavit is a legal document that is used to confirm the truth of a statement under oath. It is typically prepared in written form and must be signed by the person making the statement, known as the "affiant." This document serves as evidence in court, as it outlines facts from the affiant’s knowledge and can be used to support legal claims or defenses.

The importance of an affidavit lies in its reliability; because it is sworn to be true, it carries significant weight in legal proceedings. Courts view affidavits as official statements, and they can be used in various contexts, such as in civil cases, real estate transactions, and other legal issues that require verification of facts.

Other options present different types of statements or processes related to legal truths, but they do not focus on the formalized, sworn nature of the affidavit. An affirmation is a declaration made without an oath, verification usually pertains to the process of confirming information rather than a formal statement, and testimony is the spoken evidence given by a witness in a court. Each serves its purpose but does not specifically meet the criteria of being a legal document affirming the truth of a statement under oath like an affidavit does.