What was one example Dr. Jeff gave for convection how was the heat transferred?

One example Dr. Jeff gave for convection was boiling water in a pot. He explained that heat is transferred through convection as the hot water at the bottom of the pot rises to the surface, while the cooler water from the surface sinks to the bottom. This creates a continuous circulation pattern known as a convection current, where heat is transferred from the heat source to the entire volume of the liquid.