Explanation:

- Limited Needs: In a barter system, individuals typically engage in direct exchanges where one person’s surplus is traded for another's surplus. It thrives in environments where people's needs are basic and limited, aligning with the immediate availability of goods.

- Limited Exchange Area: Barter is more effective in small, localized areas due to the complexity of finding a direct match for goods and services over a large area. It often thrives within communities with close connections, allowing for straightforward exchanges.

- Economically Backward Society: Barter is more common in less economically developed areas where the monetary system is not prevalent. People resort to barter due to lack of currency or banking systems.

- All the above: All the above conditions collectively create an environment where barter is a viable means of exchange.

Correct Answer: All the above