Final answer:
Clara is a round character when she shows complexity and development, similar to real-life individuals, and provides surprises that are realistic, as described by E.M. Forster.
Step-by-step explanation:
Clara is considered a round character when she exhibits a significant level of complexity and undergoes development, leading to changes in her personality or understanding throughout the work. This complexity is akin to that of real people we encounter in daily life, which is characterized by a psychological depth and a sense of unpredictability. A round character is one who surprises readers in a convincing and realistic manner, according to E.M. Forster's distinctions in Aspects of the Novel.
In contrast to flat characters, who remain largely unchanged and can often be summed up succinctly, round characters offer a more nuanced portrayal. Textual evidence supporting the roundness of a character would include instances where the character's beliefs or behaviors evolve in response to events in the narrative. This could be shown through changes in dialogue, actions, or internal thoughts that reveal new facets of their personality or shifts in perspective.