The caucasus mountains along the northeastern border of georgia (one of the former soviet republics) makes it difficult for the nation to trade with other former soviet republics that are to its north and east. the mountain range acts as

The answer is: natural barrier

Explanation:

The Caucasus Mountains are a natural barrier since it  interferes with travel and trade between country of Georgia and its northern neighbors. Other types of natural trade barriers are different languages and long distances.

The other two types of trade barriers are tariff barriers (taxes, etc.) and non-tariff barriers (e.g. import quotas, embargoes, etc.).

hopefull this will you!

the business rule that governs the relationship is one-to-many as there are multiple customers for each agent.

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