Final answer:
The detail from the passage that supports the theme is that the group continued to share their experiences and support each other on the website.
Step-by-step explanation:
The detail from The Diary of Anne Frank that best supports the theme that sharing a difficult experience can sometimes strengthen a friendship is: "The group continued to share. One member on the site who was going through a difficult family illness wrote, ‘I don't know where I'd be without you women. It is so great to have a place to vent that I know isn't hurting anyone.' Others shared similar sentiments."
This shows how sharing their difficult experiences on the website strengthened their friendship and provided them with a supportive community.
Learn more about Themes in Literature