Read the text and choose the best word for each space.

In the 19th century, Thomas Edison invented the ____(1)_____, which was a major breakthrough in the field of illumination. The Grand Canyon, ____(2)_____ for its visually overwhelming size and intricately colored landscapes, is a steep-sided canyon carved by the Colorado River. The _____(3)____ is a famous structure built by the Ancient Romans, known for its stunning architectural detail and historical significance.