the three questions of economics are based on decisions made by economies. what statement best describes why economies must make these decisions

For the fact that the resources are limited, the economies must make the decisions.

Explanation:

At any given time, the resources that an economy can make the most out of are limited. It is mandatory for the economies that for their own benefit, they make the best and optimum use of the resources they have at hands before they run out of resources of waste them in insignificant activities. All the decisions pertaining to resources and their distribution must be hence left into the hands of the economy so that the best financial use of the resources in done.