c) Colorado River

The Colorado River carved out the Grand Canyon over millions of years. This iconic river, flowing through seven U.S. and two Mexican states, has been a significant force in shaping the landscape of the American Southwest. The Grand Canyon, one of the most famous natural wonders in the world, showcases the power of erosion and the geological history of the region. The river’s path through the canyon reveals layers of rock formations, offering a glimpse into Earth’s past. The Colorado River continues to play a crucial role in providing water and recreational opportunities in the arid regions it traverses.