It is the process by which thermal energy in one body is conveyed to another body with which it comes into contact.
Heat is always transferred from a body with more potential and kinetic energy to a body with less potential and kinetic energy, or from a high to a low temperature.
Convection does not take place in solids, because no movement of its constituent particles occurs.
How convections occurs
When highly heated particles in a liquid or gas move and replace less heated particles, convection takes place.
Convection is the process through which heat energy is moved from heated areas to colder ones.
Example of convection
The heat from the burner passes into the pot of boiling water, heating the bath's bottom.
The hot water then rises and descends in a circular manner to cover it.
Warm air should be put up in the radiator, and cooler air should be drawn in.