Answer:
The correct answer is Medium of Exchange.
Explanation:
There are three Functions of Money. One of the function is Medium of Exchange. Second one is the Store of Value and the Third one is Unit of account.
In this example, the function of the money is represented as the Medium of Exchange. One neighbor mow others neighbor's yard and in exchange of this service, the other neighbor paid $25 to that neighbor who did the service of mowing for him.
