What is displayed on the passport card under UV light?

The correct answer highlights that under ultraviolet (UV) light, a passport card prominently displays a bright eagle alongside the words "sea to shining sea." This feature is part of the passport’s security measures intended to prevent forgery and counterfeiting. The combination of vibrant colors and the specific phrase enhances the card's visual elements, making it recognizable and reinforcing national identity.

Passport cards are designed only with certain features visible under specific conditions such as UV light, and these visual markers contribute to the overall security and authenticity of the document. This UV feature helps border patrol agents and security personnel quickly verify the legitimacy of the passport when checked against other security features.

Other options contain elements that may appear on various forms of identification or documents, but they don't specifically detail the features designed to be visible under UV light on a passport card. For instance, while a watermark pattern could be a secure feature of many identification documents, it does not specifically describe the identifiable aspects of a passport card under UV light compared to the bright eagle and inscription.