Read the following villanelle, "The House on the Hill" by Edwin Arlington Robinson. Then, answer the question that follows.

They are all gone away,
The House is shut and still,
There is nothing more to say.

Through broken walls and gray
The winds blow bleak and shrill:
They are all gone away.

Nor is there one to-day
To speak them good or ill:
There is nothing more to say.

Why is it then we stray
Around the sunken sill?
They are all gone away,

And our poor fancy-play
For them is wasted skill:
There is nothing more to say.

There is ruin and decay
In the House on the Hill:
They are all gone away,
There is nothing more to say.

The lines "They are all gone away,/ There is nothing more to say" are repeated throughout this villanelle. What is the effect of those repeated lines?

To create a joyful and upbeat mood
To express the grief of missing the past
To remind the reader to cherish their memories
To show how memories affect the speaker