I am pretty sure that <span>the option which best describes one of the themes in "mending wall" by Robert frost is being shown in the first represented variant:
</span><span>wall" by Robert frost?
a.people often put up barriers</span><span>
During the poem author always asks : </span> "where it is we do not need the wall"? and the answer he gets is that "Good fences make good neighbors'', he was wondering why people always create barriers or obstacles in their lives so I bet this option is the most suitable one.
Langues chose, style of writing, and length of writing would be my answers.
tell me if i'm wrong
This is a theme because it is a concept NOT the story line. A plot summary is basically the story line as if you were writing a summary of the book or story.
