Answer:
Method A is convection and Method B is conduction.
Explanation:
There are three main methods of heat transfer. Conduction, convection and radiation.
Conduction is a method of heat transfer that occurs in solid material as heat is transferred from one hot object to a cool object through contact.
Convection is a method of heat transfer that occurs mainly in liquids and gases. Here, there is an actual movement of the molecules within the body thereby circulating the heat. Example is boiling water. The movement of the bubbles within the liquid circulates and carries the heat from one point to another.
Radiation is a form of heat transfer that requires no medium and transfers heat within a vacuum.
