Final answer:
The Treaty of Utrecht resulted in increased British territories in North America and worsened relationships between the British and the First Nations.
Step-by-step explanation:
The Treaty of Utrecht, signed in 1713, had significant impacts on the relationships among the French, the British, and the First Nations. It resulted in increased British territories in North America, as Great Britain was awarded everything east of the Mississippi River. The treaty also led to a shift in power, with France and Spain on the wane and Britain on the rise. The Native Americans who had sided with France lost a valued trading partner and bargaining power over the British, leading to worsened relationships.