Final answer:
The Royal Proclamation of 1763, which established a boundary along the Appalachian Mountains to limit expansion and manage Native American relations, significantly increased tensions after the French and Indian War, contributing to the eventual colonial unrest leading to the American Revolution.
Step-by-step explanation:
After the French and Indian War, a significant source of tension emerged from the Royal Proclamation of 1763, which established a western boundary to the colonies along the Appalachian Mountains. This proclamation created an Indian Reserve, intended to stabilize relations with Native American tribes and limit colonial expansion westward. It caused resentment among colonists eager to move westwards and among land speculators. The British policy aimed to reduce administrative costs and manage the debt from the war, but it backfired by fueling colonial discontent. This tension contributed to the deteriorating relationship between Britain and its North American colonies, setting the stage for future conflicts, including the American Revolution.