The action that is most likely to improve the ease of navigation in information-rich and complex messages is using headings to convey the contents of sections.
Headings help the users with understanding the nature of content of a page by accurately describing its sections and subsections. Headings help to break up long sections of text into shorter, more manageable subsections.
Some users rely on headings to navigate pages more easily. Without headings, some users (for example screen reader users) cannot easily browse the contents of the page or understand a document’s overall structure and layout.
Hence headings can be useful.
To know more about headings click below:
brainly.com/question/8123049
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