Why would countries be willing to place barriers on trade? explain two factors that might encourage a country to place quotas and tariffs on imported goods.

To protect its local industries and jobs. Placing trade barriers restricts cheaper goods and service that may out-compete those of the local market if allowed to freely compete in the local market.To protect its population when it feels that the foreign products or services do not meet its national standards and that the goods/services may be harmful for its local population as a measure of national security.Trade barrier and tariffs are also used as a form of diplomacy. Trade barriers are imposed on good and services from a country that a nation considers hostile.

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.