Concept:The protagonist is the central character in a story, usually the hero.
Explanation:The plot of a literary work revolves around the main character.
This main character is called the protagonist.
The protagonist is typically the hero who drives the action forward.
The author is the person who writes the story, not a character in it.
The villain is the character who opposes the hero.
The speaker is the voice delivering a poem or narration.
Therefore, the word that best matches the protagonist is the hero.
Answer:C. hero