When movement doesn't use energy and is caused by a random movement of individual particles is it diffusion osmosis or active transport?

When movement doesn't use energy and is caused by the random movement of individual particles, it is referred to as diffusion. Diffusion is the process where molecules move from an area of higher concentration to an area of lower concentration due to their kinetic energy. Osmosis specifically refers to the diffusion of water across a selectively permeable membrane, while active transport requires energy to move substances against their concentration gradient.