When testing DOC files for accessibility, what element must be hierarchical?

Headings within DOC files must be hierarchical to ensure proper accessibility. A hierarchical structure in headings means that they follow a sequential order, typically from the most important heading (usually H1) down to subheadings (H2, H3, and so forth). This logical arrangement aids assistive technologies, such as screen readers, in interpreting the document’s structure and meaning.

When headings are organized hierarchically, users can easily navigate sections of the document, understand the relationship between topics, and find the information they need without confusion. Additionally, screen reader users can utilize keyboard shortcuts to jump between headings, making it critical for a DOC file to have a clear and consistent heading hierarchy.

In contrast, while images, tables, and footers play important roles in conveying information and context, they do not require a hierarchical structure in the same way that headings do. Images should have appropriate alternative text for accessibility, and tables should be structured with headers and captions for clarity; however, these elements don't rely on hierarchical organization. Footers, while helpful for additional content or citations, also do not need to follow a hierarchical format to be effective.