Final answer:
The disadvantage of commodity money made from precious metals is that it is heavy and difficult to transport, whereas fiat money like paper currency is lightweight and declared as legal tender by government, depending on faith and trust in its value.
Step-by-step explanation:
A disadvantage of commodity money made from precious metals is that it is very heavy and hard to transport from one place to another. Commodity money, like gold and silver, has intrinsic value and can be used for other purposes besides being a medium of exchange. For instance, gold is used in electronics and aerospace, manufacture of energy efficient glass, and in the medical industry due to its good conductivity and malleability. As a contrast, fiat money like the paper currency does not have intrinsic value and is used as a legal tender based on government decree and the universal faith and trust in its value.