Answer:
They built them on hills.
Explanation:
Of course, they did this to create a natural defense from the attack of foreign invaders. For example, the city of Rome itself was built on seven famous hills. Of course, through time they tried to fortify them as much as possible, but the main defense laid on the physical location of those cities.
The answer is D. Iroquois
Being a social worker means that you are at the intersection of government, social welfare programs and the individuals. Social workers are the only ones who have personal and indepth knowlege of the needs of people and different groups and they are a vital link in any legislative process and program planning and monitoring the quality standards.