Final answer:
Denis Diderot was a French Enlightenment philosopher who made significant contributions to the Enlightenment movement, particularly through his work on the Encyclopédie.
Step-by-step explanation:
Denis Diderot was a French Enlightenment philosopher who made significant contributions to the Enlightenment movement. Along with other prominent philosophers such as Rousseau and Voltaire, Diderot believed in using reason and science to question traditional ways of thinking. He was one of the main contributors to the Encyclopédie, a comprehensive encyclopedia that aimed to provide knowledge based on reason and empirical observation.