Question

What effect did the French and Indian War have on the Native American tribes who fought in it?
They gained new rights because they had contributed to the overthrow of the French.
They gained prestige because they had fought alongside the new settlers of their land.
They suffered a loss of steady trade in fur, meat, and grain with European traders.
They suffered negative consequences because they lost both their land and their allies.

Answer 1

One of the effects that the French and Indian War had on the Native American tribes who fought in it was that "They suffered negative consequences because they lost both their land and their allies," since the British and French "used" them and gave little back. 

Answer 2

They suffered negative consequences because they lost both their land and their allies. 

That was the effect.