what is its full form?
The United States of America.
United States
The United States of America (USA), commonly known as the United States (US or U.S.) or America, is a country primarily located in central North America, between Canada and Mexico.
a city in texas known for its yellow soil and wildflowers Amarillo. is this a city? Yes. to which country does it belong to? The U.S.A.
wiki:22656156
United States [SEP] Introduction
The United States of America (USA), commonly known as the United States (US or U.S.) or America, is a country primarily located in central North America, between Canada and Mexico. It consists of 50 states, a federal district, five self-governing territories, and several other island possessions. At , it is the world's third- or fourth-largest country by total area. With a population of over , it is the third most populous country in the world. The national capital is Washington, D.C., and the most populous city is New York City. Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago, and European colonization began in the 16th century.