Step 1: Understanding the Concept:
Circular flow of income has two components: Real Flow (physical) and Money Flow (monetary).
Step 2: Detailed Explanation:
- Real Flow: Refers to the flow of factor services from households to firms and the flow of goods and services from firms back to households. It represents the physical exchange of resources.
- Monetary Flow: Refers to the flow of money (factor payments like wages, and consumption expenditure) between sectors.
- In a barter economy, there is no money. Thus, only the exchange of goods, services, and factors occurs. This is purely a "Real Flow."
Step 3: Final Answer:
The exchange of physical items (goods/factors) without money is defined as Real Flow.
Therefore, option (B) is correct.