In passive transport, how does increasing temperature generally affect the rate of diffusion across a medium?

• A. It increases the diffusion rate because molecules have greater kinetic energy and move faster.
• B. It stops diffusion entirely once a threshold temperature is reached.
• C. It has no effect on diffusion rate because diffusion depends only on concentration gradient.
• D. It decreases the diffusion rate because molecules collide less frequently at higher temperatures.

Answer: (A)