Final answer:
The growing pre-Revolutionary bias of some American colonists was against economic controls by Great Britain.
Step-by-step explanation:
The growing pre-Revolutionary bias of some American colonists was against economic controls by Great Britain. British policies, such as tightening control over the colonies, imposing new taxes, and restricting trade, caused resentment among the colonists. These actions violated the colonists' rights and autonomy, which led them to regard Britain as hostile to their interests. The discontent eventually erupted in the American Revolution.