People rely on multiple groups of people to get the resources that they want and need.

A calculated average of the amount of goods and services per person in a country.

The condition of not being able to get all the goods & services one wants. It exists because human demand for goods & services exceed the quantity of goods & services that can be produced using all the available resources.

Foreign goods being sold in your own country.

Domestic goods being sold in other countries.

Exchanging goods, services, or for other goods, services, or resources; or for money

Used to produce or provide a good or service (i.e. land, labor capital goods)