Which adjective best describes something that is bright and highly attractive?

The adjective "resplendent" is used to describe something that is brilliant, radiant, and highly attractive due to its bright and vivid qualities. It suggests a sense of splendor and magnificence, often associated with light reflecting off a surface or the dazzling appearance of something that captures attention due to its impressive beauty. This term evokes images of vibrant colors and striking appearances, making it an excellent choice for describing something that stands out because of its brightness and allure.

In contrast, the other adjectives have clearly different meanings. "Dim" refers to a lack of brightness or light, implying something that is dull and not visually appealing. "Faded" suggests a reduction in brightness or color, indicating that something has lost its vibrancy over time. "Insipid" describes something that is bland or lacking in flavor or excitement, typically relating to ideas or experiences rather than physical brightness. Therefore, "resplendent" is the most appropriate choice in this context.