Answer:
convection is the transfer of heat from one place to another.
Explanation:
In convection particles with high heat energy in warm gas or liquid moves and take the place of particles with low heat energy.
It means heat is transferred from hot place to cooler place.
Warm or heated gas and liquid are stated here because particles in gas and liquid at higher temperature moves faster which also increases it's particles volume but size will remain same only gaps between particles increases.
