Answer: Import quota
Explanation:
Import quotas are a means of controlling trade into a country. It is usually done because the good being imported is produced in the importing country but when it is imported it is cheaper which will have the effect of harming the domestic producers.
Import quotas will restrict trade by limiting the amount of the specific good that can be imported into the country within a given period. For instance, the U.S. mandating that only 30,000 tonnes of sugar may come into the country in a year. After that amount, no more sugar will be allowed in.