Select the items that describe a tariff.

tax on an imported good provides government revenue can cause other countries to impose tariffs reduces monopoly behavior

By definition, a tariff is a tax on exports or imports, or sometimes referred to as the international trade tariff.
The item that best describe a tariff is that it is the "tax on an imported good."
Tariffs are imposed to a certain country or place in order for the exporter or importer to pay the entry of their goods.