By definition, a round character is a well-developed character changes, or grows, according to occurrences in his life has only one or two developed traits.

By definition, a round character A. is a well-developed character.

Explanation:

In literature, a round character is a complex personality who has depth passions and feelings. To express that depth, writers define round characters' both physical and mental traits fully, so that they resemble real people. Unlike flat characters, who are two-dimensional and uncomplicated, round characters are complex and do not remain the same throught the story.