Answer:
Political
Step-by-step explanation:
During the revolutionary war, Both France and British empire was in a competition for superiority within the western hemisphere.
France knew that British empire's control over American colonies serve as a strong economic source for British empire.
If the Americans won the revolutionary war, the French knew that it will massively Damage Britain's economy. This will strengthen France's political influence in the Western Hemisphere. So, France decided to made an alliance with the Americans during the war.