Answer:
a) store of value.
Step-by-step explanation:
The store of value represents the security of an asset by saving, retrieving or exchanging at a later value. Like gold and other precious goods are kept on locker so that they are safe.
The medium of exchange is a medium through which the goods are exchanged either by sale motive or purchase motive between the parties involved.
The unit of account determines the measurement of a unit i.e currency, dollars, etc
The liquid asset and the liabilities are the parts of the balance sheet.