Final answer:
The First Continental Congress drafted grievances and rights of the colonists, formed the Association of 1774, and urged boycott of British goods. The Second Continental Congress led the Revolutionary War effort and adopted the Declaration of Independence.
Step-by-step explanation:
The First Continental Congress, held from September 5 to October 26, 1774, was a response to the Intolerable Acts imposed by the British Parliament on the American colonies. The Congress drafted a list of grievances and a statement of the rights of the colonists. One of its main accomplishments was the establishment of the Association of 1774, which urged colonists to boycott British goods and form militias.
The Second Continental Congress, which convened in May 1775, became more involved in leading the Revolutionary War effort and providing governance for the new American states. It eventually led to the adoption of the Declaration of Independence on July 4, 1776, marking the formal break from Great Britain and the pursuit of full independence.