Which of the following countries can you use the passport card to enter by land or sea?

The passport card is specifically designed for U.S. citizens traveling to certain countries by land or sea. One of the primary examples of this is Mexico, where travelers can present their passport card at land borders or when traveling by sea, such as on a cruise. This is because Mexico is a neighboring country, and the passport card serves as an acceptable form of identification for U.S. citizens making these types of trips.

In contrast, the other countries listed, such as Brazil, Australia, and Japan, do not accept the passport card for entry. For these destinations, a valid passport is required, and additional visas may also be necessary based on the traveler's purpose of visit. Thus, the use of the passport card is limited in scope, primarily functioning for land or sea entry into Mexico and Canada, making Mexico the correct choice in this scenario.