What is a state in the context of world regional geography?

How might hammurabi's code have prevented a single ruler from imposing, or forcing, his or her will on people?

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Why is the improved education of girls so important, especially with regard to economics and health? what are the leading causes of death among teenage girls in africa and how are they tied to education?