Which of the following best defines 'Micro Rule' in UX design?

The concept of 'Micro Rule' in UX design refers specifically to guidelines that help manage specific actions within a user interface, particularly in forms. This can include rules related to how inputs are handled, suggestions for required fields, validation messages, and the overall interaction flow when users engage with form elements. As a result, these micro-rules have a direct impact on the usability and user experience of a particular design by ensuring that actions are clear and intuitive for the user.

While guidelines for user feedback, design principles for usability, and visual representation methods are important aspects of UX design, they do not specifically encapsulate the essence of 'Micro Rule.' A 'Micro Rule' is particularly focused on the minute, yet critical, elements of user interaction that contribute to the overall effectiveness of a design, especially in form-based scenarios. Thus, it is centered around specific actions rather than broader guidelines or principles.