What does the term 'responsive typography' refer to?

Responsive typography refers to the practice of adjusting font sizes, styles, and other text properties based on the screen size or viewport of the device being used. This approach ensures that text is legible and aesthetically pleasing across a variety of devices, such as smartphones, tablets, and desktops, each with different screen dimensions and resolutions.

By implementing responsive typography, web designers can create a more user-friendly experience that caters to the needs of users on various devices. This can involve using relative units like percentages or viewport units, which allow the text to scale appropriately, making it easier for users to read without the need for zooming in or out.

The other options focus on aspects that do not align with the concept of responsive typography. For instance, using bold fonts for emphasis does not take into account the adaptability of the text to different devices. Similarly, specifying a particular font that adapts to different browsers does not capture the essence of responsive design, which is about scalability and readability across different screen sizes. Lastly, creating fixed-width text does not allow for any flexibility or responsiveness, which is contrary to what responsive typography aims to achieve.