Specialization is when a business, economy, or area focuses production on a limited scope of products or services to gain efficiency. It is the basis of global trade as few countries can be self-sufficient. Specialization requires trade so countries can import what they don't produce and export what they produce. Forms of specialization include by occupation, tasks, stages of production, and geographical location based on factors like climate and resources. Transportation choices like road, rail, air, and sea must match the type of goods being imported or exported.