Final answer:
The Proclamation of 1763 was issued to prevent conflicts with Native Americans in the Ohio Valley by prohibiting colonists from settling or buying land west of the Appalachian Mountains.
Step-by-step explanation:
The purpose of the Proclamation of 1763 was to prevent conflicts with Native Americans living on land west of the Appalachian Mountains.
The British government issued this proclamation after gaining control of French territory in North America at the end of the Seven Years' War. They wanted to avoid conflict with Indian tribes in the Ohio Valley and prevent the costs of defending the frontier. The proclamation prohibited colonists from purchasing land or settling west of the Appalachian Mountains.