Why did written language take so long to developed

What is the relationship between surface winds in the northern and southern hemisphere?

Stie cineva cati ani poti fii director de sa imi specificati si legea va rog

The persian wars started when emperor darius i began an invasion of greece. what caused darius to decide to attack greece? a. greek pirates had raided persia's merchant ships and coastal towns. b. greek armies had attacked and taken over land that belonged to persia. c. greek city-states had supported rebellions in the persian empire. d. greek leaders had declared independence from the persian empire.