Final answer:
The Proclamation of 1763 escalated tensions in the colonies by restricting Western settlement, sparking resentment among colonists towards British rule.
Explanation:
The Proclamation of 1763 escalated tensions in the colonies primarily by prohibiting Western settlement beyond the Appalachian Mountains, angering colonists who sought to expand their territories. This restriction was intended to pacify Indian tribes and maintain peace, indicating a shift in British policy towards the colonists. Colonists viewed the Proclamation as a constraint on their land rights and growth, leading to increased resentment towards British rule.
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