Answer:
Simile.
Explanation:
Simile is a figurative language used in poetry where a comparison has been made of one thing from another, though they are of different kinds. Similes re used to provide a more vivid image/ picture of the thing that has been described.
In Robert Frost's poem "Mending Walls", he talks of two neighbors mending their fence. By the act of repairing the stone wall in between their properties, the men met up every year to mend it. And by picking up the stones only from their own sides, the speaker is suggesting that the men do not interfere in each other's lives or issues. Rather, they focus on their own lives and rebuild the fence, an image of demarcation of their own separate lives.
The simile is seen in the 38th line of the poem when the speaker describes his neighbor strength in their act of repairing the wall. To him, he looked like a primitive "old-stone savage" man who "grasped [the stone] firmly by the top in his hand".
