The primary reason ancient peoples of the nile
river valley built levees, dikes, and reservoirs
was to
(1) purify sacred waters
(2) create a shorter route to distant cities
(3) defend against invaders
(4) increase agricultural production

What was the main cause of the russian revolution? a. the protests against the war with poland b. the tremendous war losses of world war 1 c. the protests against the treaty of brest- litovsk d. the losses dictated by the treaty of versailles