Concept:Money primarily functions as a medium of exchange, unit of account, store of wealth, and standard of deferred payment.
Explanation:Among the given options, only storing wealth is a recognised function of money.
Money preserves purchasing power over time, enabling individuals to save and use it in the future.
Option A is incorrect because money is a medium of exchange, not a medium of communication.
Option B is incorrect because money measures value, not securities, as a unit of account.
Option D is incorrect because discounting bills of exchange is a banking function, not a core function of money.
Thus, the correct function of money from the options provided is storing wealth.
Answer:C. Store of Wealth