Which of the following is NOT a method of heat transfer?

The correct answer is "Consolidation" because it does not refer to a method of heat transfer. Heat transfer is the process by which thermal energy moves from one system to another or from one part of a system to another, and this can occur through conduction, convection, and radiation.

Conduction is the transfer of heat through direct contact between materials, typically seen in solid objects where atoms and molecules collide and transfer energy. Convection involves the movement of heat through fluids (liquids and gases) where warmer areas of the fluid rise while cooler areas descend, creating a flow that transfers heat. Radiation, on the other hand, is the transfer of heat in the form of electromagnetic waves, such as infrared radiation from the sun warming the Earth.

Consolidation does not describe any of these processes; rather, it means the process of making something more solid or strong, often through physical or mechanical means, which is unrelated to the mechanisms of heat transfer.