Question

Which detail from The Diary of a Young Girl best supports the mood of terror and anxiety?

“I don't think I'll ever feel at home in this house, but that doesn't mean I hate it.”
“Whatever we do, we're very afraid the neighbors might hear or see us.”
“Until Wednesday, I didn't have a chance to think about the enormous change in my life.”
“And we have to be quiet so the people downstairs can't hear us.”

Answer 1

“Whatever we do, we're very afraid the neighbors might hear or see us.”

This line explicitly states fear and anxiety about being discovered, directly supporting a mood of terror and unease.