We keep the wall between us as we go. to each the boulders that have fallen to each. and some are loaves and some so nearly balls we have to use a spell to make them balance: "stay where you are until our backs are turned! " we wear our fingers rough with handling them. oh, just another kind of out-door game, one on a side. it comes to little more: there where it is we do not need the wall: he is all pine and i am apple orchard. what feature of this excerpt makes it blank verse?
a. it has iambic pentameter.
b. it has a rhyming pattern.
c. it is about nature.
d. it does not use everyday language.

a. It has iambic pentameter.

Explanation:

Robert Frost's poem "Mending Walls" is about two neighbors in a rural setting, who meet whenever the wall dividing them needs repairing. This 'wall' is both literal and figurative, for it symbolizes the physical barrier that walls one thing in and another thing out. Then, it is also symbolic in its representation of human's nature to build barriers from each other, no passage or interaction.

It is a blank verse for its use of the iambic pentameter form of lines. Blank verses are those works written without any specific rhyme scheme and mostly employs the iambic pentameter form. Iambic pentameter implies the presence of ten syllables in a line, alternating between a stressed and unstressed syllable. The stressed and unstressed parts are as follows, just a few lines as an example (stressed syllables in bold)-

We keep the wall between us as we go.

To each the boulders that have fallen to each.

And some are loaves and some so nearly balls

and so on.

b on edge iambic pentameter

Explanation:

uncanny would be like unlucky or disaster. you can look for more in the dictionary or if you have text book then turn to a. 17 but it's different with textbooks.