Final answer:
Patrick Henry appeals to the emotions of faith and providence in his speech, suggesting that a higher power supports the American cause and provides moral justification for the struggle for independence.
Step-by-step explanation:
The primary emotion Patrick Henry appeals to in the line, "Besides, sir, we shall not fight our battles alone. There is a just God who presides over the destinies of nations, and who will raise up friends to fight our battles for us," is an appeal to faith and providence. Henry evokes the sense that a higher power is on the side of the American cause which provides moral justification and hope to his audience. This emotional appeal is meant to foster a sense of confidence and unity among the colonists by implying divine support in their fight for independence.