Answer:
This is an example of a Tariff
Step-by-step explanation:
A Tariff is a tax imposed on the importation of a commodity into a country.
If the US demands that a fee is paid to the government for every tomato coming from Mexico, this fee will be called the tariff that Mexico pays to the US government.
Tariffs serve as forms of regulation of foreign trade and help maintain stability in prices of domestic products within the country.