Which statement best defines an affordance in user interface design?

• A. An property suggesting its use
• B. An element that guarantees accessibility
• C. A visual cue with no relation to function
• D. A metric used to measure performance

Answer: (A)

An affordance in user interface design is a property of an object that suggests how it should be used. This matters because it lets users infer the appropriate action just by looking, reducing guesswork. For example, a raised button implies you can click it, a slider with a handle implies you can drag, and a link that’s underlined and colored signals that you can open it. The emphasis is on cues that point to a possible interaction, not on guarantees of accessibility or on measuring performance. If a visual cue doesn’t relate to how to interact, it won’t guide the user, and if something looks clickable but isn’t, that’s a poor affordance in practice.