Answer:
The answer is - Walls around the city provided protection from enemies, a moat filled with water from the Euphrates River surrounded the city and natural ladnforms offered protection from invaders.
Step-by-step explanation:
Nebuchadnezzar fortified the city of Babylon and the area that was protected amounted to about 500 acres. The city was impenetrable for that day and age. Not only did it have a protective purpose but an esthetic one as well. The gates were adorne with glazed bricks depicting animals such as bulls, lions and dragons. In addition to this he made a moat and filled with water from the Euphrates River surrounded the city. To the north the city was protected by the Euphrates river and had massive bridges along these rivers that were built up with battlements.