Which of the following is an example of an American innovation?

The airplane is recognized as an American innovation primarily due to the significant contributions of the Wright brothers, Orville and Wilbur, who made the first successful powered flight in 1903 in Kitty Hawk, North Carolina. This achievement marked a pivotal moment in human transportation and technology, setting the foundation for modern aviation.

While other inventions listed, such as the printing press and the telephone, are indeed crucial innovations in their own rights, they predates the establishment of the United States. The printing press was invented by Johannes Gutenberg in the 15th century, and Alexander Graham Bell, who is often credited with inventing the telephone, was a Scottish-born inventor who later became a naturalized American citizen. The wheel is an ancient invention, dating back thousands of years before the United States was formed.

The development of the airplane by Americans highlights the nation's innovative spirit during the early 20th century, showcasing its role in advancing technology and transforming global travel and commerce.