The answer is simple, really. It's because it represents their marriage. And it was carved into an olive tree, if I'm not mistaken. So if you wanted to move something carved into a tree, you would have to move the tree so... hope this helps in any way shape or form. :)
Is a <span>The bird flew north of the beach . </span>
In "To Kill a Mockingbird" the story is told by Scout, the curious, tomboyish main character in the book.