Concept:Commodity money is money that has value in itself because it is made from a material that is useful or valuable.
Explanation:In the past, items such as gold, silver, salt, cowries, and shells were used as money.
These items have intrinsic value because they can also be used for other purposes.
However, commodity money is no longer commonly used in modern economies.
It has been replaced by more convenient forms like bank money and paper money.
Since commodity money is the form that is no longer in present-day use, it is the correct answer.
Answer:A. commodity money