Is John Thornton from the call of the Wild a Flat or round character?

John Thornton from "The Call of the Wild" is considered a round character. He is depicted with depth and complexity, exhibiting a range of emotions and traits, such as kindness, bravery, and a strong bond with Buck. His relationship with Buck highlights his nurturing side, contrasting with the harshness of other characters in the story. This multifaceted portrayal allows readers to connect with him on a deeper level.