What feature is displayed over the photo on a passport card?

The feature that is displayed over the photo on a passport card is the US eagle holding an olive branch. This symbol represents the authority and sovereignty of the United States. The eagle is a national emblem, embodying strength and freedom, which makes it appropriate for official documents like a passport card. The olive branch, traditionally a symbol of peace, reflects the country's commitment to peaceful relations.

The other options do not appear on passport cards. While an American flag might be significant in various contexts related to national identity, it is not featured in this specific area of the passport card. Similarly, a map of the USA and a portrait of George Washington, while symbolically important to American identity and history, are not represented in that section of the document. Thus, the presence of the US eagle clearly distinguishes this official identification as an emblem of national significance.