Answer:
Trading is (and was) a way to put a price on something so that we know its worth.
If someone needs something, they can "trade" something for what they need.
<em> - Anyways, hope this helps!</em>
The Native Americans were unhappy with Oklahoma becoming a territory because major parts of Oklahoma had previously been set aside as "Indian Territory." Therefore, when Oklahoma became a state the Native Americans faced greater pressure to give up lands from new white settlers from the eastern states.
Families worked together, because each of the members of the family had different jobs. Together they were able to do everything they needed to do to survive.
It was the fact that world super powers at the time (U.S) and (U.S.S.R) where building up an armory of nukes but they both knew if they where to use these weapons it would utterly destroy the world.
Here's a memory aid: (U.S): hey Russia lets not kill each other with nukes in this war lets just keep it "COOL" and spy on each other instead
