Which line from the poem above illustrates alliteration?

Since the poem wasn't provided in the question, I can only tell you what to look for in the poem to find your answer.

Alliteration is the repetition of the beginning sounds, for example:

Sally sells sea shells on the sea shore.

i'm sorry i don't understand the question.

paine is arguying that they had tried everything before coming to the conclusion that they needed to fight for their freedom.

argument: "every quiet method for peace hath been ineffectual."

claim 1: "our prayers have been rejected with disdain; and only tended to convince us, that nothing flatters vanity, or confirms obstinacy in kings more than repeated petitioning and nothing hath contributed more than that very measure to make the kings of europe absolute."

claim 2: "wherefore, since nothing but blows will do, for god’s sake, let us come to a final separation, and not leave the next generation to be cutting throats, under the violated unmeaning names of parent and child."