What is the introduction to the Constitution called?

The introduction to the Constitution is called the Preamble. This section is significant because it outlines the fundamental purposes and guiding principles of the Constitution, setting the tone for the document as a whole. The Preamble begins with the famous phrase "We the People," which emphasizes the idea of popular sovereignty, indicating that the authority of the government is derived from the people. This introduction serves to explain the intentions behind the Constitution and sets forth the goals that the framers aimed to achieve, such as securing the blessings of liberty and establishing justice.

The other options do not accurately represent the introduction of the Constitution. A conclusion typically summarizes or wraps up content, while a prologue usually sets the stage for a narrative rather than providing foundational principles for governance. An appendix is generally a supplementary section that contains additional material or information related to the main text, rather than serving as an introduction. Thus, the Preamble is the correct term for the introductory statement of the Constitution.