Question

warm air rises and cold air sinks is an example of?
convection
radiation
conduction
all of the above

Explanation:

Convection is the transfer of heat through the movement of fluids (liquids or gases). Warm air is less dense and rises, while cold air is denser and sinks, creating a convective current. Radiation is the transfer of heat in the form of electromagnetic waves (e.g., heat from the sun). Conduction is the transfer of heat through direct contact (e.g., heat transfer through a metal rod). Since the described phenomenon involves the movement of air (a gas), it is convection.

Answer:

convection