Final answer:
The rate of diffusion depends on the surface area and permeability of the membrane, temperature, and the steepness of the concentration gradient.
Step-by-step explanation:
The subject of this question is Biology. The rate of diffusion is dependent upon several factors, including the surface area and permeability of the membrane, temperature, and the steepness of the concentration gradient. Surface area and permeability of the membrane affect the rate of diffusion by increasing or decreasing the available space for molecules to move through and determine how easily they can pass through the membrane. Temperature affects the rate of diffusion by influencing the kinetic energy of the molecules, with higher temperatures increasing the speed of molecular movement. The steepness of the concentration gradient refers to the difference in concentration between two areas, with a greater difference resulting in a more rapid diffusion.