Compare and contrast the river valley civilizations

The earliest forms of civilizations were said to be located on the three river valleys of the Tigris-Euphrates River in ancient Mesopotamia, the Nile River in ancient Egypt and the Huang He and Indus River in ancient India and China. These three river valley civilizations had many differences yet still lived common life styles. Although the civilizations are located on different continents, they share similar social, political, and economic beliefs from their intellectual developments to types of government to religious beliefs and trading systems. When the civilizations were first invented, there was a lot of chaos and confusion. This led to the invention of the different forms of writing

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it proved indian land claims were unjustified.

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the steamboat is your answer.

it seems like its the only form of transportation on the choices.