I really need some help here pls

Why is it useful for historians to base certain studies on the analysis of historical themes

Which region of georgia grows the most crops? appalachian plateau coastal plain piedmont ridge and valley

7. how did the early egyptians use the flooding of the nile river to their advantage? they diverted the water to flood their enemy's lands and destroy their crops. they created an easier way to travel to the mediterranean sea and the indian ocean. they established a new water-based athletic event for the ancient olympics in greece. they devised an innovative irrigation system, which created a surplus of food.