Final answer:
The excerpt from A Raisin in the Sun most clearly conveys the theme of racial discrimination and identity.
Step-by-step explanation:
The theme most clearly conveyed in the excerpt from A Raisin in the Sun is Racial discrimination and identity. The dialogue between Beneatha and another character demonstrates the challenges and conflicts she faces as a black woman, such as encountering prejudice and struggling to assert her cultural identity. Beneatha's plea for support from the other person reflects the larger social issue of racial discrimination that the play explores.