Excerpted from "the children's hour" by henry wadsworth longfellow they are plotting and planning together to take me by surprise. which poetic device does the poet use in these lines?
a. simile
b. metaphor
c. alliteration
d. repetition

It cannot be:

Simile: involving the comparison of one thing with another thing. 

Example: He/She is as brave as a lion 

Methaphor: refers to something as being the same as another thing for rhetorical effect. 

Example: The classroom was a zoo. 


Between the last 2 options:

Remember that alliteration is: a stylistic literary device identified by the repeated sound of the first consonant in a series of multiple words, or the repetition of the same sounds or of the same kinds of sounds at the beginning of words or in stressed syllables of a phrase.

Example: But a better butter makes a batter better.

This is an alliterative because the same first letter of words (B) occurs close together and produces alliteration in the sentence.

While... Repetition is: Repetition is a literary device that repeats the same words or phrases a few times to make an idea clearer.

Example: I looked upon the rotting sea,
And drew my eyes away;
I looked upon the rotting deck,
And there the dead men lay.

So between both the one that makes more sense is Alliteration.