Final answer:
American colonists resisted British imperial policy after 1763 due to increased taxes, desire for autonomy and self-governance, and territorial disputes.
Step-by-step explanation:
After 1763, American colonists resisted British imperial policy for several reasons. One major cause of resistance was the increased taxes imposed on the colonies by the British government to pay off the debt from the French and Indian War. The colonists felt that they were being unfairly taxed without their consent and that their rights were being violated. Additionally, the British government's attempt to tighten control over the colonies, such as the Quartering Act that forced colonists to house and feed British troops, further fueled resistance.
Another factor that contributed to the resistance was the colonists' desire for greater autonomy and self-governance. The colonists wanted to have a say in their own governance and be able to make decisions that were beneficial to their interests. They believed that they should be able to tax themselves and have representation in the British Parliament.
Furthermore, the British government's disregard for the colonists' territorial claims and their interference with westward expansion also led to resistance. The Royal Proclamation of 1763, which established a western boundary for the colonies, and the decision to grant control of the Ohio Valley to Quebec angered the colonists who wanted access to those lands for settlement and economic opportunities.