The example of stock from the options given is: Money supply

Explanation:

• Stocks refer to quantities measured at a specific point in time.
• Money supply is a stock variable as it represents the total amount of money in an economy at a specific moment. It is not a flow variable like the number of cars produced during 2023 or profit for the year, which are measured over a period. Consumption is also typically a flow variable, reflecting the amount consumed over a certain period.