Matching.

1. leaders within the concilium plebis tribunes
2. one of two houses of the early roman republic, which consisted of regular, middle-class male citizens of rome citizen assembly
3. members of rome's richest and most important families patricians
4. a leader of the empire who collected the taxes and sent the money back to rome accountability
5. the condition of being answerable to others governor

Migration the ability to meet current needs without reducing the ability to meet future needs 2. immigration the leaving of one's homeland to settle in a new place 3. migration a situation in which the birth rate is not sufficient to replace the existing population 4. overpopulation the movement of people to a new country 5. sustainable development the increase in the population of a city 6. underpopulation a situation in which resources are being used up at a faster rate than they can be replenished 7. unsustainable development a situation in which the number of people exceeds the available natural resources in an area 8. urbanization the movement of people from one place to another