Which post wwii superpowers engaged in the cold war?

Plz i need this answer t-t in a couple of paragraphs, list two reasons why florence is the birthplace of the renaissance. explain how these reasons contributed to the renaissance

Atype of infrastructure that state governments maintain is schools roads libraries parks

What happened in the tinker v des monies? and why is it important what happened in the hazlewood v. kuhlmeier? why is it important?