Economic resources are limited and cannot meet the needs of all human beings, it is necessary to choose what products and services work in much of what should be produced before what should be produced.
Economic resources are limited and can not meet the needs of all human beings. It was therefore necessary to select What products and services Made in the number of What should the production What should the production To meet human needs as much as possible and not to be wasted in vain.
Economic resources are limited, and can not meet the needs of human at all, so need to be selected. To produce goods and services? Manufacture of how much, what should produce what should be produced.