Question

which type of trade barrier is explicitly used for political purposes?
tariffs
standards
quotas
embargoes

Explanation:

Embargoes are trade barriers explicitly used for political purposes. Tariffs are taxes on imports, quotas limit quantities, and standards relate to product regulations (not primarily political). Embargoes involve restricting trade with a country to achieve political goals (e.g., pressuring a regime).

Answer:

embargoes