Passive transport involves movement of substances.

A. from areas of lower concentration to area of higher concentration

B. from areas of higher concentration to areas of lower concentration

C. from areas in which the concentration has reached a balance

D. from areas of differing concentration with the use of cellular energy

The answer is B

Passive transport involves the movement of substances across the cell membrane without the need for cellular energy. There are two types of passive transport: diffusion and facilitated diffusion.

Diffusion is the movement of particles from areas of higher concentration to areas of lower concentration. This occurs because particles naturally move down their concentration gradient to achieve a state of equilibrium. No energy is required for this process.

Facilitated diffusion, on the other hand, is the movement of substances across the membrane with the aid of specific transport proteins. These proteins help facilitate the passive movement of substances such as ions or larger molecules that cannot easily cross the lipid bilayer of the cell membrane. Like diffusion, facilitated diffusion also occurs from areas of higher concentration to areas of lower concentration without the use of cellular energy.

Therefore, the correct option for the movement involved in passive transport is B. from areas of higher concentration to areas of lower concentration.