Final answer:
Protectionist policies seek to shield domestic producers and workers from foreign competition. They can take the form of tariffs, import quotas, and nontariff barriers.
Step-by-step explanation:
Protectionist policies seek to shield domestic producers and workers from foreign competition. There are three main forms of protectionism: tariffs, import quotas, and nontariff barriers. Tariffs are taxes imposed on imported goods, import quotas limit the quantity of imported goods, and nontariff barriers include regulations, inspections, and paperwork that make importing products more costly or difficult.