Answer:
II. With the smallest of hints, a fragile mind can deceive a person.
IV. A child's amusement can have a negative effect on others.
Step-by-step explanation:
The story, "The Open Window" tells of Vera the niece of Mrs. Sappleton who was obsessed with lying and found pleasure from doing this. She told a false story of the death of Mr. Sappleton and his three in-laws to Mr. Framton who came visiting and who had a fragile mind because of the nervous disorder he suffered. On seeing the supposedly dead people coming back from the view offered by the open window, he fled from the house.
The story shows that what seems to be fun for children might have bad effects on others seeing that this man was not in a healthy mental state. It also shows that a fragile mind can deceive a person, because Mr. Frampton was easily carried away with Vera's lies because of his nervous breakdown.