Answer:
Definition: To carry from one place to another by means of a vehicle.
Importance: It manages traffic flows, and also enables the undisturbed and steady movement from one place to another.
Explanation:
I believe they go up because for supplies to be limited, people must be buying that product. So it makes sense once the products are limited, the prices will go up because either way the people are buying. Maybe even more now, more abundantly and faster because the product is limited.