Which of following best explains how a barter system works?

A barter system is an economic method where goods and services are directly exchanged for other goods and services without using money as an intermediary. Participants negotiate and agree on the value of the items or services being traded, often requiring a double coincidence of wants, meaning each party must have what the other desires. This system can be limited by the lack of a standardized value and the need for mutual agreement, which can complicate transactions.