Final answer:
Miss Adela Strangeworth perceives people in her town as disturbed because of her role as a self-appointed moral guardian, her suspicious nature, and her habit of sending anonymous letters based on unfounded assumptions.
Step-by-step explanation:
In the short story "The Possibility of Evil" by Shirley Jackson, Miss Adela Strangeworth perceives many people in her town as disturbed due to her own suspicious nature and self-appointed role as a moral guardian. Believing she has a duty to protect her town from the "possibility of evil," Miss Strangeworth writes anonymous letters to her fellow citizens, revealing supposed secrets and transgressions, which cause distress and turmoil.
Her actions are based on her own interpretations and often unfounded assumptions about others, leading her to see disturbance where there might not be any.