PLEASE HELP What act of cowardice does “the youth” commit in chapter 6, and why is a third person narrator point of view essential here?

The book is called "The Red Badge of Courage"

The youth's injury is misidentified as a battle wound, which his companions interpret as the reason for his absence. Fleming's comrade, Wilson, who early in the novel is the belligerent "loud soldier," dresses his wound. The next day, Fleming demonstrates the skills of a fine, upstanding soldier, fighting bravely alongside Wilson and rescuing the regimental flag. Displaying camaraderie and leadership, Fleming wins the praise of officers. In the final battle charge, Fleming accompanies Wilson as he captures the enemy flag, which signals the regiment's victory. The novel concludes with Fleming's reflections on the past days' events. Though haunted by his abandonment of the tattered man, he is proud of his accomplishments in battle and celebrates his entrance into manhood.

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