States developed

Write a 6 pages compare and contrast essay. The prompt is "States developed independently in very different environmental settings. Environmental factors can be both stimuli or constraints to the development and sustainability of ancient states. Compare and contrast the relationship of environmental factors to the rise and fall of complex civilizations in at least two civilization areas. How do climate, geography, geology, plant and animal species, agricultural potential, resource abundance or scarcity affect the development and history of states in each region?". Be sure to have at least 3 sources,