Final answer:
The movement of molecules from an area of high concentration to an area of low concentration is referred to as passive transport, a process that does not require cellular energy.
Step-by-step explanation:
The transport process corresponding to the movement of molecules from an area of high concentration to an area of low concentration is known as passive transport. This type of movement, called diffusion, does not require energy because molecules move along the concentration gradient, that is, from a region where they are more concentrated to one where they are less concentrated. It contrasts with active transport, where molecules move from an area of low concentration to an area of high concentration, which requires energy in the form of ATP (adenosine triphosphate).