Question

1. the kinds of money

personal possession of currency is prohibited in u.s. prisons, although, in practice, prisoners still exchange goods and services. u.s. prisoners used cigarettes as a medium of exchange until smoking was banned in u.s. prisons in 2003. after 2003, prisoners looked to other items on the commissary menu to facilitate exchange. in 2008, the wall street journal reported that energy bars had caught on as money in some u.s. prisons. one important difference between using energy bars and using dollars as money is that ▼ have intrinsic value.
u.s. dollars are an example of ▼ money.

Explanation:

For the first blank: Energy bars are a commodity used as money, so they have intrinsic value (value from their use as a good). Dollars are fiat money, so they don't have intrinsic value in the same way. So the first blank is "energy bars".
For the second blank: U.S. dollars are fiat money, which is money that has value because the government declares it as legal tender, not due to intrinsic value.

Answer:

First blank: energy bars
Second blank: fiat