Do US dollar is a currency made of low cost materials it is valuable/ need help ?!?!

The answer is "Option C".

Explanation:

It is government-issued money that isn't back by a product includes gold or silver. It provides central banks more influence over the government as they can regulate how so much money is created. The majority of modern paper currencies, such as the U.S. dollar, is fiat currency. It is a medium of exchange that had to define as money, usually by government regulation. It proposes as a replacement for paper currency and representational currency.

what are local authorities doing to fix the problem

explanation: what are local authorities doing to fix the problem

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.