Final answer:
In Ray Bradbury's Fahrenheit 451, the character that most clearly represents the author's voice and thematic intent is Montag, as he experiences a transformation that conveys the central themes of the novel.
Step-by-step explanation:
The character who most clearly represents the voice of the author and demonstrates his thematic intent in Ray Bradbury's Fahrenheit 451 is Montag. As the protagonist, Montag undergoes a significant transformation from a firefighter who burns books to a rebel who seeks knowledge and challenges the oppressive society.
Through Montag's internal conflict, experiences, and evolving perspective, Bradbury explores themes such as censorship, the value of literature, and the dangers of a conformist society. Unlike Montag, characters like Beatty, Faber, and Mildred play specific roles that contrast or support Montag's development, but they do not embody the author's voice to the same extent.