Answer:
that resources are perfectly shiftable from the production of one good to another.
Explanation:
Production possibilities frontier defines that is a graph showing all the different production combinations of two products which can be manufactured using present resources and technology. The production possibilities frontier incorporates scarcity, option and trade-off principles.
In other term Production possibilities frontier Indicates the cumulative production mixture of different products or services that an economy can achieve by making optimal use of all available resources.