👉 Fluid, in its various forms such as liquids and gases, moves through a system due to the application of external forces or pressure gradients. In liquids, this movement is primarily driven by viscosity and surface tension, resulting in phenomena like flow, diffusion, and capillary action. Gases, on the other hand, exhibit more dynamic behavior, with their movement influenced by temperature, pressure, and external forces, leading to processes like diffusion, convection, and turbulence. These fluid dynamics are fundamental in understanding natural phenomena, engineering applications, and biological processes, ranging from ocean currents to blood circulation.