What were the two main purposes of the Declaration of Independence? formally announce the independence of the American colonies
express a desire to remain loyal subjects of the British king
request settlement rights of the colonists in the West
list the grievances that the colonies had against the British government
request the British parliament to suspend the Writs of Assistance

Formally announce the independence of the American colonies.

List the grievances that the colonies had against the British government.

Explanation:

The Declaration of Independence is the written document that was signed on July 4, 1776, declaring the independence of the colonies from British rule. This document was adopted at the Second Continental Congress meeting held in Pennsylvania, becoming the formal declaration of independence of the United States.

The main purpose of this declaration is to announce the freedom of the American colonies from under the clutches of the British monarchy. It also lists a number of grievances that the newly independent colonies had against the British government, some of which were taxation without consent, no fair trial, etc.