A mother needed someone to baby sit her child but had no money. She made a deal with other person who wanted to move into a new house and thus needed assistance in moving things from old house to new house. In the deal, they decided to help out each other. Which kind of system does this refer to?

Barter system

The correct answer is Option 3: Barter system

Barter is a system of exchange in which participants in a transaction directly exchange goods or services for other goods without using money. The scenario described refers to the barter system, where goods and services are exchanged directly for other goods and services without the use of money. In this case, the mother agreed to help with moving in exchange for babysitting services, illustrating a direct exchange of services.