A central idea of "Stopping by Woods on Snowy Evening" is that the speaker wants to admire the beauty of nature in the woods. How does this idea develop over the course of the poem?

The woods fill with snow, and the speaker realizes he must go before it gets too deep.

The speaker stops to see the snowfall in the woods but knows his responsibilities won't allow him to stay long.

The speaker wonders if his neighbor is aware of the beauty in his woods and wants to tell him.

The snowy woods make the speaker feel lonely, and he becomes frightened and decides to leave.