WORLD CIVILIZATION

Detailed explanation-1: -The extent of Persia varied, but at its height, it extended southwards to the Persian Gulf and Indian Ocean; to the east and northeast, the Indus and Oxus rivers; to the north, the Caspian Sea and Mt. Caucasus; and to the west, the Euphrates River.

Detailed explanation-2: -The Persians were the first people to establish regular routes of communication between three continents-Africa, Asia and Europe. They built many new roads and developed the world’s first postal service.