Answer:
Tariff:
A tariff is a levy placed on goods imports and exports by the government of a country or a supranational union. Import tariffs can be a kind of foreign trade regulation and policy that charges imported items to stimulate or safeguard home industry, in addition to being a source of income for the government.
Quota:
A quota is a government-imposed trade restriction that restricts the number or monetary worth of products a nation can import or export in a certain period. In international commerce, governments employ quotas to help manage the volume of trade between them and other countries.
Embargo:
An order of a government prohibiting the departure of commercial ships from its ports.