Utility in design refers to what aspect?

Utility in design specifically focuses on the degree to which essential features are available and effectively serve the user’s needs. It emphasizes the functionality of a design, ensuring that users can access the tools or options they require to accomplish their tasks efficiently. A design with high utility provides a practical and valuable experience, enabling users to achieve their goals without unnecessary obstacles or distractions.

In contrast, aspects like learning speed, memorability, and ease of navigation are important for overall usability but do not directly define utility. Utility is more concerned with the "what" aspect of features rather than the "how" of using those features. Thus, the correct answer captures the core idea of ensuring that the most needed functionalities are readily accessible to the user.