Question

3. An intraduction or a preface, for example to
a book, a written document, speech, etc.
that explains its purpose is called.​

Answer 1

Answer:

A preface or proem is an introduction to a book or other literary work written by the work's author. An introductory essay written by a different person is a foreword and precedes an author's preface. The preface often closes with acknowledgments of those who assisted in the literary work.