Answer:
Mayella is afraid of Atticus.
Step-by-step explanation:
Atticus has the power to expose her as a poor white woman who has attempted to seduce a black man. This shows that Mayella is very scared of what people may think of her, but most of all shows that she is scared of her father, Bob Ewell, since he is forcing her to be in the trial.
(I hope this helps !!)