Final answer:
The claim that France allied with the American colonies due to the Continental Congress is false; the alliance was mainly influenced by the American victory at Saratoga.
Step-by-step explanation:
The statement that France signed a formal alliance with the colonies during the American Revolution because of the formation of the Continental Congress is false. France's decision to ally with the American colonies was significantly influenced by the colonial victory at the Battle of Saratoga in 1777. This victory was crucial in convincing the French that the American cause had a chance of success, leading to the formal alliance that proved vital in the colonies' victory against the British. The establishing of the Continental Congress did play a key role in the governance of the colonies during the revolution and in the eventual decision to seek independence through the Declaration of Independence, but it was not the direct cause of the French alliance.