What are the main problems of evidence in dealing with early civilizations? to what extent have scholars managed to resolve some of these problems

"Artifacts and their comparison" are the main problems of evidence in dealing with early civilization.

Scholars also "found Indus valley civilization" near river Indus.

Explanation:

Early civilization discovered in many parts of the world especially near Rivers where they get an adequate amount of drinking water and food.

By some major artifacts, Scholars managed to found out that Rivers are the main cause of Growth and Decline of these early civilizations.

Scholars found that Indus-valley civilization which was founded near the river Indus, was destroyed by the flood of Indus river but scholars could not found the exact fact some scholars, said it was destroyed by flood or earthquake could not say exactly.

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