Paraphrase this text. Our available resources always fall short of our output desires. The central problem here is scarcity, a situation where our desires for goods and services exceed our capacity to produce them. Till the time we are born, we are considered statistically as consumers and there is a method of tracking supply and demand of goods consumed and services rendered. Every nation in a macro scale or business in a micro scale specifically targets three critical questions: What to produce? How to produce it? For whom to produce it for? A production-possibilities curve describes the various combinations of final goods or services that could be produced in each time-period allotted with available resources and technology. Depending on the need of specific goods or services we can track the amount created and efficiency of production of thesecombinations. Anything outside of the curve is outside of the limitations of resources. Ademand schedule indicates the quantities of goods a consumer can buy at alternative prices. A demand curve is a graphical illustration of a demand schedule. Each point on the curve refers to a specific quantity that will be demanded at a given price. This is important, because it gives us a graphical representation of supply and demand at market price. Opportunity cost represents an alternative given up when a decision is made, we must be able to determine what needs outweighs the other when it comes to meeting demands