Answer
Introduction and thesis (preamble) › list of reasons why the British government is oppressive (grievances) › conclusion that the colonies must separate list of evidence against the British government.
Step-by-step explanation
The Declaration of independent was a one of the most important official document which was drafted in United States to find ways to become independent from great Britain. The main purpose was that all men have equal rights that is rights to life and liberty.
The introduction of the document proclaimed that the colonies have the right to be independent. The grievances which were raised against the king were that he had refused his Assent to laws which was most important for the public. The conclusion that the colonies must separate the King and have their own government