ANS:B - Newton's law of cooling

Convective heat transfer, in which heat is transferred by the movement of warmed matter (fluid), is described by Newton's law of cooling. Newton's law of cooling states that the rate of heat transfer between a surface and a fluid (or surrounding environment) is directly proportional to the temperature difference between the surface and the fluid. This law is specifically applicable to convective heat transfer processes, where the fluid flow plays a significant role in carrying heat away from the surface. Therefore, the correct answer is: Newton's law of cooling