Final answer:
A belt loader in the context of building cars in a factory is used to transport materials or components from one workstation to another. It would place a belt inside the car's cargo bin as it moves the car body from one position to another.
Step-by-step explanation:
In the context of building cars in a factory, a belt loader is used to transport materials or components from one workstation to another. In this case, the belt loader is used to move the car body to different positions on the factory floor, where additional parts are added. So, to answer your question, the belt loader would place a belt inside the car's cargo bin as it moves the car body from one position to another.