Name one territory of the United States.

Puerto Rico is a territory of the United States, having been acquired as a result of the Spanish-American War in 1898. It is an unincorporated territory, which means it is governed by the U.S. Congress under the Territorial Clause of the Constitution but does not have the full rights of a U.S. state. Puerto Ricans are U.S. citizens, but they do not have voting representation in Congress and do not vote in presidential elections.

The other options are either sovereign nations or territories outside of U.S. jurisdiction. Canada is an independent country to the north of the U.S. Mexico is a separate country to the south and has no territory under U.S. governance. Cuba is also a sovereign nation located south of Florida and is distinct from U.S. territories. Thus, Puerto Rico stands out as a direct example of a U.S. territory in this context.