The correct answer to this open question is the following.
At the end of the French and Indian War, Great Britain took some actions that angered the settlers in the American Colonies.
Great Britain had defeated France. On October 7, 1763, King George III signed the proclamation that annexed new territories to the English monarchy in America: Florida and Quebec. Known as the Proclamation of 1763, this document also forbid the American colonists to settle the territories west the Appalachians. This prohibited to buy and settle Indian territory. It was just the British crown the only one that could purchase land. Of course, the colonists were mad at the king and did not obey the order.
The British monarchy had many doubts about the loyalty of the colonists in America. True or not, the British government felt that the colonists had not shown enough support to the British during the French and Indian War, and the Proclamation of 1763 would serve as a "sever call" or punishment to let the colonists know that the King was the ruler of the Americas.