Why states affects the movement of particles for diffusion?

The state of matter—solid, liquid, or gas—affects the movement of particles during diffusion due to differences in particle arrangement and energy. In gases, particles are widely spaced and move rapidly, allowing for faster diffusion. In liquids, particles are closer together and move more slowly, leading to slower diffusion rates. In solids, particles are tightly packed and vibrate in fixed positions, making diffusion extremely slow or negligible.