Final answer:
Aluminum will be affected by heat more rapidly than steel because it has a higher thermal expansion coefficient, meaning it expands more when heated.
Step-by-step explanation:
When exposed to heat, different metals expand at different rates due to their varying thermal expansion coefficients. The question asks which of the given metals will be affected by heat more rapidly than steel. When we compare the thermal expansion coefficients of tin, lead, copper, and aluminum to that of steel, we see that aluminum has a higher coefficient. This means aluminum will expand more quickly when heated than steel will. Specifically, the thermal expansion coefficient of aluminum is around 22-24.5 x 10-6/°C, whereas that of steel ranges from about 10-13 x 10-6/°C, depending on its alloy composition.
Therefore, aluminum is the correct choice as it will respond to heat changes more rapidly than the other metals listed, including steel.