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The word that means "a formal agreement between two or more governments" is B. Treaty.
Here's why:
1. Treaty: A treaty is a formal and legally binding agreement between two or more sovereign states or international organizations. Treaties are used to establish rights and obligations among the parties involved, covering various aspects such as trade, peace, alliances, and more.
2. Tariff: A tariff is a tax or duty imposed on goods that are traded internationally. It is not a formal agreement between governments but rather a policy tool used to regulate trade.
3. Subsidy: A subsidy is a form of financial aid or support extended to an individual, group, or economic sector. It is not a formal agreement between governments but a financial assistance mechanism.
4. Barrier: In the context of international relations or trade, a barrier refers to any obstacle or restriction that hinders the free flow of goods, services, or people across borders. It is not specifically related to a formal agreement between governments.
In conclusion, the correct word that aligns with the definition of "a formal agreement between two or more governments" is B. Treaty.
