Answer:
The introductory sentence states the Declaration's main purpose, to explain the colonists' right to revolution. In other words, “to declare the causes which impel them to the separation.” Congress had to prove the legitimacy of its cause.
Step-by-step explanation:
The opening paragraph explains why the document is written. It asserts the need that the colonies have to dissolve their bonds with Great Britain and assume the rights and privileges that they feel entitled to.