What is the most likely reason many civilizations developed around rivers?

a) people could dispose of their wastes in rivers
b) rivers offered people a way to defend their cities
c) many businesses used rivers to import and export goods
d) the river provided people with water, food, and transportation

What does the word precocious mean in this sentence

How can behavioral science be applied in improving public health? a.by tracking a disease to determine its sourceb.by creating promotions that improve health habitscboth by tracking a disease to determine its source and by creating promotions that improve health habitsd.neither by tracking a disease to determine its source or by creating promotions that improve health habits

How does moon shadow beliefs about dragons him to understand what is happening