What is the term that describes heat transfer by warm air or liquid rising and cooler or liquid sinking creating a circulation current?

The term that describes heat transfer by warm air or liquid rising and cooler air or liquid sinking, creating a circulation current, is convection. This process occurs in fluids, including gases and liquids, where the warmer, less dense portions rise while cooler, denser portions sink, leading to a continuous circulation pattern. Convection is a key mechanism in various natural phenomena, such as weather patterns and ocean currents.