Why did so many early civilzations arise near rivera valleys

Which were the most important issues during the presidential election of 2008? a.economic downturn and environmental protection b.two overseas wars and economic downturn c.two overseas wars and campaign spending d.environmental protection and campaign spending

Need asap plz ! looking at the map what effect might have geography played in americans having a political revolution against their king in great britain?

Which of the following best represents the accomplishments of spain’s golden century? the appreciation of jewish and muslim scholars and artists the paintings and sculptures brought back by the spanish armada the staging of the many comedies and romances of lope de vega the friendly political alliances among spain, britain, and the ottoman empire