Final answer:
The contributions listed refer to John Adams, who defended British soldiers at the Boston Massacre trial, helped negotiate the Treaty of Paris, and was the second President of the United States.
Step-by-step explanation:
The contributions listed: Responsibility, defending at the Boston Massacre trial, negotiating the Treaty of Paris, and perseverance, refer to the accomplishments of John Adams. John Adams was a pivotal figure in early American history, playing a significant role as a lawyer, diplomat, and politician.
He defended British soldiers during the Boston Massacre trial, showcasing his belief in the right to a fair trial. Furthermore, Adams was one of the negotiators of the Treaty of Paris that ended the Revolutionary War and was the second President of the United States, displaying great perseverance throughout his career.