Question

something there is that doesnt love a wall, that sends the frozen - ground - swell under it, and spills the upper boulders in the sun; and makes gaps even two can pass abreast. the work of hunters is another thing: i have come after them and made repair where they have left not one stone on a stone, but they would have the rabbit out of hiding, to please the yelping dogs. the gaps i mean, no one has seen them made or heard them made, but at spring mending - time we find them there. whom does the speaker blame for the gaps in the wall? himself his neighbor nature and hunters rabbits and dogs

Explanation:

The speaker mentions that something in nature (frozen - ground - swell) causes gaps in the wall and also blames hunters who move stones to flush out rabbits.

Answer:

C. nature and hunters