Answer:
D). "He moves in darkness."(line 41)
Step-by-step explanation:
In the context of the poem 'Mending Wall' penned by Frost, the speaker talks about a wall that 'repairing' or 'mending' the wall that isolates the speaker's house and his neighbor.
As per the question, the line 'he moves in darkness' suggests that the author disapproves of the neighbor's attitude of having walls as feels that the wall acts as a barrier that prevents the two neighbors from sharing each other's thoughts and compel them to move in isolation. Yet the other aspect of having walls is presented through the perspective of the neighbor that it offers the necessary space to neighbors and keeps their friendship long-lasting. Thus, option D is the correct answer.