The Grand Canyon, carved out by the Colorado River and the most spectacular gorge in the world, is located in which state of the United States of America?

Arizona

The correct answer is Option (2) → Arizona

The Grand Canyon is located in the state of Arizona.

While it was carved out by the Colorado River, only a small portion of the canyon system extends into other states; the iconic, spectacular gorge itself is primarily situated within north-central Arizona. It is preserved as a UNESCO World Heritage site and is managed largely as part of the Grand Canyon National Park.