International trade refers to the exchange of goods and services between countries. For example, Lesotho sells wool and mohair to other countries and imports goods like sugar, coffee and clothes. International trade can provide economic benefits such as foreign exchange, job creation, and access to new technologies and markets. However, it also faces challenges like high transportation costs, perishable goods spoiling, and trade barriers imposed by countries. These challenges can be overcome through fair trade agreements and maintaining a balanced trade between imports and exports.