Review the procedural text. A diagram titled Evacuation Plan with a map of a building floor indicating where you are located, primary and secondary exits, bathrooms, emergency medical supplies, and wheelchair access. Shaded areas of the building correspond to the nearest exit. Which text feature, if added, would best aid the reader’s understanding of the document?

If a header showing the purposes of the text were added, the reader would better understand the document.

Explanation:

A header giving a title to the document and showing its objectives would increase the reader's understanding of the document, as it would show the reader what the text seeks to achieve and what will be presented in the document. This allows the reader to increase their interest in the information in the document and allows the document to be read on an efficient and complete basis.

b is the answer for this question.