Diffusion can be defined as
question 7 options:

movement through a cell membrane by active transport using energy from atp

movement of particles from a region of high concentration to a region of low concentration

movement of particles from a region of low concentration to a region of high concentration

the movement of particles up/against their natural concentration gradient.

Movement of particles from a region of high concentration to a region of low concentration

Explanation:

Diffusion can be defined as the movement of particles from a region of high concentration to a region of low concentration. Diffusion is a special type of diffusion that involves movement of solute molecules from a region of a high concentration to a region of high concentration until equilibrium is achieved.Diffusion is a passive transport of particles, which means it does not involve use of energy in the form of ATP like the case of active transport.