This is a compound sentence because you can break it into two sentences.
Hope this helps
Answer:
The family knew of a safe hiding place in an attic in Holland.
The phrase that describes is at a leisurely pace since it is describing the pace as leisurely.
The theme is A, a message about life and human behavior. Sometimes, the theme of the lesson isn't directly stated, but is implied throughout the story, so it can't be B. Opinions of the reader are opinions of the piece of literature, and have nothing to do with the literature directly. And the introduction is the beginning paragraph of the story, which the theme is displayed throughout the story, not just one part.