The excerpt that reflects a grievance of the American colonists included in the Declaration of Independence is:
"He has dissolved representative houses repeatedly for opposing with manly firmness his invasions on the rights of the people."
This line specifically addresses a complaint against King George III for undermining the colonists' legislative bodies, which was a significant grievance that helped justify the decision to declare independence. The other excerpts you provided contain important principles and the declaration of independence itself, but they do not specifically outline a grievance like the selected quote does.