What feature overlaps the photo on a passport card?

The feature that overlaps the photo on a passport card is a debossed eagle. This design element serves both functional and security purposes. It adds a tactile feature that makes it easier to authenticate the document by touch, allowing officials to identify the card's legitimacy without relying solely on visual inspection. The presence of the debossed eagle also enhances the overall security of the passport card by incorporating unique features that are difficult to replicate, thereby discouraging counterfeiting.

In contrast, while holographic images, blue stars, and microchips are indeed present on passports and could serve various security functions, they do not overlap the photo specifically in the way that the debossed eagle does. Holographic images typically appear as a layer on the surface, blue stars are embedded in the card's design, and microchips are embedded within the card for electronic verification. Each of these features contributes to the security and functionality of the passport card but does not serve the same role as the debossed eagle in relation to the photograph.