In an era before electron communications, where messages were passed physically, the Persians established a system of sea, river and road transport to pass information in a timely manner.
Alexander the Great took effective control of the Empire in 331 BCE, so by 330 BCE there was no Persian Empire to rule - it was the Macedonian Empire of Alexander.
Conquest, establishing an effective provincial government system, and being able to protect the Empire and advance its prosperity.
All of them, so he could take over all of the Persian Empire.
They divided the empire into 20 provinces with a Persian governor and the cities and tribes retained their traditional government. The governors provided internal and external security and supervised the local government.
They were so important because it led to the destruction of the Persian Empire.
Persian is a normal type so fighting type would be super effective.
Because the policy led to cultural diversity in the empire.
The Roman empire emerged progressively, after having gained dominence of the Italian peninsula, it expanded into Sicily and Spain in the mid-3rd Century BCE and consolidated and expanded this over the following centuries, reaching its height in the 2nd Century CE. The Persian empire existed from 550 to 330 BCE. So the first is Persian Empire.
It converted the Delian League cities it had led against the Persian Empire into an empire of its own, and ruthlessly used its financial and military resources for its own benefit and power.
To produce a civilisation, after producing a surplus to finance it, you need sophisticated ways of doing things. So you need specialised workers to carry it out. This was begun in the Middle East by the Assyrian Empire, replaced by the Babylonian Empire then by the Persian Empire to carry it on and improve it.
What best describes the Persian Empire is an empire that we're very strong and fought many battles. Also they we're an empire that had an enormous empire! The biggest of the time, that stretched over the vast lands of Turkey, Israel, Jordan, Iraq, Iran, Afghanistan, Pakistan and a little tiny bit of India. They also had some magnificent leaders, that rulers for many years. So obviously the Persian Empire was a great period of history.
Effective communication is when you and the one your talking with is seeing your point and your seeing their point. You have to have good eye contact and speak loudly enough for them to hear you, you also need to speak well so they can understand what you are saying. If none of this works then you are clearly not showing effective communication.