What does a production possibilities curve represent?

Explanation:production possibilities curve PPC also called a production possibilities frontier a graphical model that represents all of the different combinations of two goods that can be produced the PPC captures scarcity of resources and opportunity costs.

i believe the answer is:   psychological  experiment

in this experiment, wilhelm wundt became the first person that implement scientific method in analyzing the pyschological phenomenon.

due to this result, wilhelm wundt also able to make psychology to be acknowledged as a separate scientific field from biology.

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.