Final answer:
The situation described in the question is an example of an import quota. An import quota is a restriction on the quantity of a specific good that can be imported into a country.
Step-by-step explanation:
The situation described in the question is an example of an import quota. An import quota is a limit set by the government on the quantity of a specific good that can be imported into the country. In this case, Harleen is having difficulty finding the Preo car she wants because the government has imposed a limit on the number of imported Preos allowed each year. This restriction is aimed at controlling the number of imported cars and protecting the domestic automobile industry from foreign competition.