President carter worked to ease tensions with china by -establishing full diplomatic relations. -limiting international trade. -agreeing to stop communism. -limiting us production of nuclear weapons.

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse