Which of the following is a true statement about diffusion?

a. diffusion is only important for animal cells.

b. diffusion requires energy input from the cell.

c. only water can diffuse across a cell membrane.

d. molecules move from areas of high concentration to areas of low concentration.

D is the correct answer, molecules move from areas of high concentration to areas of low concentration

explanation:

on disadvantage of hydroelectric power is the cost. another disadvantage of using hydroelectric power is finding a water source powerful enough to harvest hydroelectric power.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.