What is the difference between U.S. citizenship and a U.S. green card?

What is the difference between U.S. citizenship and a U.S. green card?

The United States of America is often referred to as the land of opportunities. With a vibrant economy and a diverse culture, millions of people from all over the world dream of becoming a part of the American dream. Two of the most common ways for foreigners to legally reside in the United States are…