The list of complaints makes up the largest part of the document's structure, or pattern of organization. What does its structure contribute to Jefferson's argument? How does it reinforce his main idea?

This question is about Declaration of Independence. When document was prepared committee members knew that it must bear the moral foundation. The document have many grievances specially illuminated by Jefferson himself, specifically grievances towards British Empire such as,

We hold these truths to be self-evident, that all men are created equal, that they are endowed, by their Creator, with certain unalienable Rights, that among these are Life, Liberty, and the pursuit of Happiness.

That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed,

These grievances make the basis of the Declaration. The division of the government to executive, legislative and judicial branches is an example of grievances, as well.

This structure in Jefferson's argument might contribute to inform and give a bad impression of what he is stating, the tyranny over the colonies, he expresses how he suffered the king. He might also want to portray all his effort and how he was ignored.