Explain why the changes in demand for the complement and the substitute follow different patterns

A lower price for a substitute decreases demand for the other product. A higher price for a substitute good has the reverse effect. Other goods are complements for each other, meaning that the goods are often used together, because consumption of one good tends to enhance consumption of the other.

~Bella M

the statment would be a easy nonviolent one

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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