Examlex
The event that changes a protostar to a full-fledged star is
Exchange
The act of trading goods, services, currencies, or other commodities between parties.
Self-interest
The pursuit of personal advantages and well-being, often guiding individual economic decisions.
Division of Labor
A method that breaks down the production of a product into a series of specific tasks, each performed by a different worker.
Specialization
The concentration of the productive efforts of individuals or organizations on a limited number of activities, leading to increased efficiency and productivity.
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