Answer:
the exchange of money facilitating production and trade
Step-by-step explanation:
Diana receives money in exchange of service delivered to Tiago of tutoring for economics, that is received in his bank through a payment app.
Further she uses that money to buy a pizza and the payment is made in the form of bank payment.
In this case there is trade of goods.
This clearly reflects that there is constant movement in form of goods and services in exchange of money, that is exchange of goods and services is dependent on money.