The red dye moves due to the process of diffusion, which is driven by the kinetic energy of its molecules. The molecules of the red dye constantly collide with each other and with the molecules of the surrounding medium, causing them to spread out. On the other hand, the blue dye is moved by the process of convection. This is due to the energy provided by heating the liquid or by a temperature difference in the medium. As a result, the blue dye rises or sinks, creating fluid motion. Therefore, the energy sources for the red and blue dye are different, with diffusion relying on molecular kinetic energy and convection depending on thermal energy or temperature difference.
