Dive suits for undersea exploration have which type of device attached to the diver breathe

The economy of the united states is best described as

Much of the ill will between armenians and the azeri people of azerbaijan arises because

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.