What can cause a movement along the production possibilities curve?

A movement along the production possibilities curve occurs when there is a change in the quantity of goods produced. The production possibilities curve (PPC) illustrates the maximum efficient output of two goods given a fixed amount of resources and technology. When an economy reallocates its resources to produce more of one good, this leads to a decrease in the production of another good, resulting in a movement along the curve itself rather than a shift of the curve.

For instance, if an economy decides to increase the production of consumer goods, resources must be drawn away from the production of capital goods, which reflects a change in output levels while remaining within the bounds defined by the curve. This is in contrast to other options, which refer to changes in the economy that would shift the entire curve rather than cause a movement along it.