Final answer:
Mexico is the country which encompasses Cozumel Island, Tiburon Island, and Isla Angel de La Guarda, showcasing the nation's diverse geography.
Step-by-step explanation:
The country that has Cozumel Island, Tiburon Island, and Isla Angel de La Guarda is Mexico. Cozumel Island is a popular tourist destination in the Caribbean Sea off the eastern coast of Mexico's Yucatán Peninsula. Tiburon Island is in the Gulf of California, also known as the Sea of Cortez, which separates the Baja California Peninsula from the Mexican mainland.
Isla Angel de La Guarda is also located in the Gulf of California, to the northeast of Tiburon Island. These islands are part of Mexico's rich geographical diversity, which includes famous volcanoes such as Popocatépetl and Pico de Orizaba, as well as vibrant cities like Mexico City.