Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by temperature differences. It involves the physical motion of the fluid, carrying energy from one place to another.
Conduction: The process by which heat energy is transmitted through collisions between neighboring atoms or molecules without any motion of the material as a whole.
Radiation: The transfer of energy by electromagnetic waves; it does not require a medium to travel through.
Buoyancy: A force exerted by a fluid that opposes an object's weight; it drives natural convection currents within fluids.