What can cause a movement along the production possibilities curve?

Movement along the production possibilities curve (PPC) occurs when there is a change in the quantity of goods produced due to resource allocation shifts between different types of goods. The PPC illustrates the trade-offs an economy faces when it comes to allocating resources between the production of various goods and services.

When more resources are devoted to producing one good, the economy has to reduce the production of another good, leading to a movement along the curve. For instance, if an economy decides to produce more of good A (like cars), it must use resources that could have been allocated to producing good B (like computers), resulting in a shift along the PPC.

The other choices deal with factors that shift the entire curve rather than simply moving along it. Changes in resource availability, technology, and consumer preferences can lead to shifts in production capabilities or demand but do not directly cause changes in the output of existing resources, which is what a movement along the curve represents.