Answer:
Caption
Step-by-step explanation:
An informational text can be defined as a literary work that presents factual information about an event, people, places or things.
Some examples of informational text are newspapers, biographies, reference materials, textbooks, magazines, reports, essays, instruction manuals etc.
Basically, an informational text feature helps the reader to clearly understand and easily navigate through the book.
Some examples of an informational text feature is caption, table of contents, headings, glossary, pictures, index, sidebars etc.
The main purpose of captions in an informational text is to explain the main idea of a particular literary element.