The most important purpose of irrigation was to

preserve scarce water supplies.
provide transportation routes.
share water with neighboring peoples.
keep farmers from growing food surpluses.

How was classical persia's extensive network of roads important to its civilization?

In which sentence is the italicized word used correctly? a) the sloth is a benefactor that primarily feeds on vegetation, insects, and small birds and reptiles. b) the flood victims were eternally grateful to their benefactors who provided them with food, shelter, and clothing. c) the spectators in the stadium all cheered when the benefactor announced the game would go into overtime. d) the benefactors visiting the laboratory were impressed by the complex equipment the scientists used.

Sparta faces threats from without and within the city-state who posed these threats.