Final answer:
The central themes of 'To Kill A Mockingbird' are racism, human dignity, and growing up. Sexism is present, but not as central as the other themes.
Step-by-step explanation:
The novel To Kill A Mockingbird centrally addresses several themes, including racism, human dignity, growing up, and to a lesser extent, sexism. However, of the options provided, sexism is not as central a theme as the others. While there are elements of sexism depicted in the characterizations and the society portrayed within the novel, these do not occupy the forefront of the narrative to the same degree as the exploration of racial injustice, the moral growth of the children, and the dignity of various characters in the face of societal prejudice.