The library in egypt became the center of research, literature, and science

Alexandria.

Explanation:

The library at Alexandria in Egypt became the center of research, literature, and science. It is also known as the Royal Library of Alexandria and was created by Ptolemy I Soter. It was one of the biggest and most important libraries during ancient Egypt.

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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