A new idea that Cervantes celebrates in Don Quixote is

Individuality.

Explanation:

Don Quixote is a book that was well written by Miguel de Cervantes Saavedra; a famous Spanish writer. The book is based about the story of a man called Alonso Quixano, from La Mancha. In his bid to restore chivalry and serve his nation, Quixano became Knight-Errant, while trying to achieve his aim.

Hence, a new idea that Cervantes celebrates in Don Quixote is known as "INDIVIDUALITY"

The correct answer is C. Individuality.

Explanation: Just took the test. That's the answer on Edge 2021. Also, Don Quixote shows the individuality of heroes and how they develop, so that's correct.