Concept:
A trade barrier is a restriction imposed by a government on international trade. It is used to control imports and exports in order to protect domestic industries and regulate the flow of foreign goods into the country.
Step 1: of trade barrier.
Trade barriers are measures that limit or restrict the free exchange of goods and services between countries.
Step 2: of trade barrier.
One common example of a trade barrier is tariff. A tariff is a tax imposed on imported goods, making them more expensive and encouraging consumers to buy locally produced products.
Final Answer:
An example of a trade barrier is a tariff (tax on imports).