Phoenix City, located in the state of Arizona, United States, belongs to the continent of North America. North America is one of the seven continents of the Earth, encompassing the northernmost part of the landmass. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the east, the Pacific Ocean to the west, and South America to the south. The continent is characterized by a diverse range of landscapes, including mountains, forests, deserts, and plains.

Phoenix City's geographical location is a key factor in its classification as part of North America. The city is situated in the southwestern United States, near the border with Mexico. According to the United States Census Bureau, Phoenix is the fifth-most populous city in the United States and the most populous city in the state of Arizona. The city's elevation is approximately 1,120 feet (340 meters) above sea level, and it is known for its hot, dry climate, which is typical of the Sonoran Desert region.

The Sonoran Desert, where Phoenix is located, is one of the most biologically diverse deserts in the world. It spans across parts of the United States and Mexico, with the majority of it lying in the state of Arizona. The desert's unique ecosystem is home to a variety of plant and animal species that have adapted to the harsh conditions. This region's climate and geography are a direct result of its placement within the North American continent.

Data from the United States Geological Survey (USGS) supports the classification of Phoenix City as part of North America. The USGS provides detailed geographical information, including maps and data on the continent's landforms and ecosystems. According to the USGS, the Sonoran Desert is a distinct geographical feature within North America, and Phoenix City is situated within this desert region.

In conclusion, Phoenix City belongs to the continent of North America due to its geographical location within the United States and its placement in the Sonoran Desert region. The diverse landscapes and ecosystems of North America, including the unique characteristics of the Sonoran Desert, contribute to the city's identity as a part of this continent.