Please help answer these two questions about the holocaust WILL MARK BRAINIEST

Which event was one of the causes of the french revolution in 1830?

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.

What is the orthodox interpretation of why the cold war started