What feature do languages exhibit when they use tags to specify text formatting?

Languages that utilize tags to specify text formatting are described as exhibiting markup features. Markup languages, such as HTML and XML, allow users to define the structure and presentation of text using tags that indicate how different pieces of text should be formatted, nested, or styled. This tagging system helps in organizing content and allowing web browsers or other applications to interpret and display the information correctly.

The nature of markup languages focuses primarily on the presentation and semantics of data rather than executing logic or performing computations, which distinguishes them from other programming paradigms. In markup, the focus is on how content appears and is structured rather than how it behaves or is processed, which is why this response is appropriate in the context of your question.