The soil of the yellow river is very fertile .how might the river's fertility affect where and why a civilization in china might develop

How were the economies of the northern and southern states different? how ere they the same? what factors led them to develop differently?

Ineed ideas for how to have fun with my friends i feel like they dont like me

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases