What tag is commonly used to identify navigation links within HTML code?

The correct choice identifies the "nav" tag, which is specifically designed for marking up a section of a webpage that contains navigation links. This semantic HTML element allows web developers to indicate that certain links are part of the site's navigation structure. Utilizing the "nav" tag enhances accessibility and usability, as it helps assistive technologies recognize the navigation areas, thereby improving the browsing experience for users with disabilities.

In contrast, other tags serve different purposes; the "section" tag is used to define sections of content within a page but is not specifically meant for navigation. "Table" tags are employed for structuring tabular data and do not pertain to link navigation. Finally, the "span" tag is an inline element often used for applying styles to a part of text, lacking the semantic meaning related to navigation. Thus, the "nav" tag is the appropriate choice for identifying navigation links in HTML, further supporting better web standards.