Please Only Answer If You Have Studied The " River Valley Civilizations)". Choose two categories from the River Valley Civilizations sheet. Then, write an essay comparing and contrasting the four civilizations in those two categories. For example, you could choose to compare and contrast the governments and the writing systems of the four civilizations. Provide specific information in your essay. Be sure to explain both how the civilizations were alike, and how they were different, in those categories. You can use the River Valley Civilizations sheet as a reference. ( Will Mark Brainliest to whomever can actually help me without recopying someone else answers that are already on here. Will Mark Brainliest