Which tag is used to define a hyperlink in HTML?

The tag is specifically designed to create hyperlinks in HTML. It allows users to click through to other resources, whether that be another web page, a file, or a different location within the same page. The "href" attribute of the tag specifies the URL of the page the link goes to, making it essential for navigation across the web.

The other options do not serve the purpose of creating hyperlinks. The tag is primarily used to define relationships between the current document and external resources, such as stylesheets. It does not create clickable links for navigation. The tag is not a standard HTML tag at all, and thus it cannot be utilized for hyperlinks. Similarly, the tag does not exist in HTML. Therefore, is uniquely suited for defining hyperlinks.