Compléter EconomicsVersion en ligne 6th Grade Econ Vocab par Morgan Velez 1 producers specialization economy Opportunity supply Interdependence Owners and workers are called . How much of something you have is . Making only some types of goods and services is . is when people or regions depend on others for certain things . cost is the cost of doing one activity compared to doing something else . The study of the system in which people make , exchange , or use things that have value is called .