What is the poetic form of this excerpt from Robert Frost's "Mending Wall"?

"Mending Wall" is one of Robert Frost's most famous poems. When you are asked about the form of something, you need to start with the very basics. At root, the form is "poetry." Delving more deeply, we consider what type of poetic form Frost has chosen. In this instance, we can see that the lines do not rhyme with each other, so it isn't a traditional poetic form like a sonnet or a ballad. However, at the same time, if you sound out the lines, you can hear that they fall into a distinct rhythm and pattern. This regular meter—known as iambic pentameter, because there are five stressed beats, or feet, per line—means that this is not a free verse poem. Although it does not rhyme, these metrical verse features mean that we refer to it as blank verse.

Explanation:

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in night, why are wiesel and his father evacuated from the auschwitz concentration camp? a massive escape makes the nazis question the security of auschwitz. they are assigned to work as laborers in a factory at another camp, buna. hitler has ordered that all remaining jews be relocated within german borders. the german army needs the camp guards to go to the battle front for a last-chance defense.