Final answer:
Mr. Ewell is disrespectful and aggressive on the witness stand, using racial slurs and showing prejudice, reflective of the novel's themes of racial injustice.
Step-by-step explanation:
In To Kill a Mockingbird, Mr. Ewell behaves on the witness stand in a confident and at times aggressive manner. He is disrespectful, especially towards the defense attorney, Atticus Finch. Mr. Ewell testifies with an air of superiority and attempts to sway the jury with a crude understanding of justice, rather than with the facts. His testimony is filled with racial slurs, an indicator of his deep-seated prejudice. His behavior reflects the larger themes in the book regarding racial injustice and the character of the society in which the trial takes place, underlining the tension between truth and bigotry within the legal system of that era.