:) giving 20 points

read the passage:
and on a day we meet to walk the line
and set the wall between us once again.
we keep the wall between us as we go.
to each the boulders that have fallen to each.

which line develop the idea that walls prevent people from each other?

and on a day we meet to walk the line

and set the wall between us once again.

we keep the wall between us as we go.

to each the boulders that have fallen to each.