Which best describes one of the themes in the "mending wall" by robert frost?

The theme of this poem is that a respectful distance between neighbours is the recipe for harmonious relationships:
‘Good fences make good neighbors’.

The theme of this poem is a farmer’s pride in the wisdom passed down to him by his father:
‘He will not go behind his father's saying’.

The poet portrays an unusual and dour country character:
‘like an old-stone savage armed he moves in darkness’.

The theme of this poem is co-operation between neighbours:
‘I let my neighbour know beyond the hill’.