The three main valley civilizations are ancient Egyptian, Mesopotamian, and ancient Chinese. They had different writing systems and innovations as well.
A Bronze Age civilization in South Asia's northwest was called the Indus Valley Civilization (IVC), also known as the Indus Civilization. The writing systems, geography, and innovations of the river valley civilizations were comparable to each another.
Early civilizations shared characteristics in five areas like religion, business, agriculture, social organization and hierarchy, and architecture.
Therefore, the three valley civilization are different in relation to the writing system.
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