Examlex
A person is suffering from ____________________ if he or she consistently feels tired and inefficient during the day due to lack of sleep.
Primitive Societies
Early human communities characterized by simple social structures and technologies.
Feasible
Capable of being done or achieved; possible to do easily or conveniently.
Barter
Trading goods and services directly without involving money as an intermediary.
Barter System
An ancient method of exchange where goods and services are directly traded for other goods and services without using money.
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