Why is holden a round character in Catcher in the Rye?

Holden is considered a round character in "The Catcher in the Rye" because he is complex and multidimensional, exhibiting a range of emotions, thoughts, and behaviors throughout the novel. He undergoes personal growth and change, showing both positive and negative qualities that contribute to his overall complexity as a character. His internal struggles and conflicting beliefs make him more realistic and relatable to readers.