May someone me out with this question : ) ?

Explanation:

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The WPB replaced the Supply Priorities and Allocation Board and the Office of Production Management. The WPB directed conversion of industries from peacetime work to war needs, allocated scarce materials, established priorities in the distribution of materials and services, and prohibited nonessential production.

The purpose of the War Production Board/WPB was to regulate the production of things such as fuel and materials. It was also for the allocation of materials and fuel during WWII for the citizens of the United States. It was an executive order by President Roosevelt.

I hope this helps! ;)

these civilizations were located around fertile rivers, where they could produce an abundance of crops

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