A ……………….. market can describe any area where people are free to trade goods. ​​​​​single market doubled- market Multi-market

The term that best fits the description is "multi-market." A multi-market refers to a situation where there are various segments or areas within which people engage in trade, allowing for diverse transactions and varying economic activities.

In contrast, a "single market" typically denotes a scenario where barriers to trade are minimized among a group of countries or regions, allowing for the free movement of goods, services, capital, and labor. The term "doubled-market" isn't standard in economic terminology.

Therefore, the correct phrase to complete the statement is:

A multi-market can describe any area where people are free to trade goods.