Stainless steel pans are usually provided with copper bottoms. The reason for this could be that (a) copper bottom makes the pan more durable. (b) such pans appear colourful. (c) copper is a better conductor of heat than stainless steel. (d) copper is easier to clean than stainless steel.
The answer will be copper is a better conductor of heat than the strainless steel is a aleoy and copper is a metal. That is why the copper is a good conductor of heat.