The river valleys of the tigris euphrates the nile and the indus were centers of civilization because they?

Which letter correctly labels the mississippi river? a b c labeled map of the mississippi river and surrounding regions.

Oraccording to document 5,do you think napoleon is a democratic reformer imperial dictator? explain.

Why are slanted roofs found on many buildings within russia and finland? a. to prevent ice slides. b. to prevent the build-up of water during heavy rains. c. to prevent heat from escaping during the clod winter months. d. to prevent snow build-up.