Which sentence states a fact?

 - The Grand Canyon was carved by the Colorado River.
 - The Grand Canyon is the most breathtaking place the United States.
The second sentence states a fact.
The Grand Canyon was carved by the Colorado River.
It can be proved by visiting the Grand Canyon National Park website.
The first sentence states an opinion.
The Grand Canyon is the most breathtaking place the United States.
Most breathtaking shows what a person believes, thinks, or feels. Another person might have a different opinion about what is breathtaking.